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https://github.com/edk2-porting/linux-next.git
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29685f6c6a
Suspend and resume of cards are being handled from the protocol layer and consequently the mmc_suspend|resume_host APIs are deprecated. This means we can simplify the suspend|resume callbacks by removing the use of the deprecated APIs. Additionally, remove dead code which also used the deprecated APIs. Cc: David Brown <davidb@codeaurora.org> Cc: Daniel Walker <dwalker@fifo99.com> Cc: Bryan Huntsman <bryanh@codeaurora.org> Cc: linux-arm-msm@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: David Brown <davidb@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
1475 lines
35 KiB
C
1475 lines
35 KiB
C
/*
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* linux/drivers/mmc/host/msm_sdcc.c - Qualcomm MSM 7X00A SDCC Driver
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*
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* Copyright (C) 2007 Google Inc,
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* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
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* Copyright (C) 2009, Code Aurora Forum. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Based on mmci.c
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*
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* Author: San Mehat (san@android.com)
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/highmem.h>
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#include <linux/log2.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/sdio.h>
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#include <linux/clk.h>
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#include <linux/scatterlist.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/debugfs.h>
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#include <linux/io.h>
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#include <linux/memory.h>
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#include <linux/gfp.h>
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#include <linux/gpio.h>
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#include <asm/cacheflush.h>
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#include <asm/div64.h>
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#include <asm/sizes.h>
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#include <linux/platform_data/mmc-msm_sdcc.h>
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#include <mach/dma.h>
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#include <mach/clk.h>
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#include "msm_sdcc.h"
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#define DRIVER_NAME "msm-sdcc"
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#define BUSCLK_PWRSAVE 1
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#define BUSCLK_TIMEOUT (HZ)
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static unsigned int msmsdcc_fmin = 144000;
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static unsigned int msmsdcc_fmax = 50000000;
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static unsigned int msmsdcc_4bit = 1;
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static unsigned int msmsdcc_pwrsave = 1;
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static unsigned int msmsdcc_piopoll = 1;
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static unsigned int msmsdcc_sdioirq;
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#define PIO_SPINMAX 30
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#define CMD_SPINMAX 20
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static inline void
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msmsdcc_disable_clocks(struct msmsdcc_host *host, int deferr)
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{
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WARN_ON(!host->clks_on);
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BUG_ON(host->curr.mrq);
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if (deferr) {
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mod_timer(&host->busclk_timer, jiffies + BUSCLK_TIMEOUT);
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} else {
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del_timer_sync(&host->busclk_timer);
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/* Need to check clks_on again in case the busclk
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* timer fired
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*/
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if (host->clks_on) {
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clk_disable(host->clk);
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clk_disable(host->pclk);
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host->clks_on = 0;
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}
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}
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}
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static inline int
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msmsdcc_enable_clocks(struct msmsdcc_host *host)
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{
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int rc;
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del_timer_sync(&host->busclk_timer);
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if (!host->clks_on) {
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rc = clk_enable(host->pclk);
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if (rc)
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return rc;
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rc = clk_enable(host->clk);
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if (rc) {
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clk_disable(host->pclk);
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return rc;
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}
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udelay(1 + ((3 * USEC_PER_SEC) /
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(host->clk_rate ? host->clk_rate : msmsdcc_fmin)));
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host->clks_on = 1;
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}
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return 0;
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}
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static inline unsigned int
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msmsdcc_readl(struct msmsdcc_host *host, unsigned int reg)
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{
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return readl(host->base + reg);
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}
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static inline void
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msmsdcc_writel(struct msmsdcc_host *host, u32 data, unsigned int reg)
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{
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writel(data, host->base + reg);
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/* 3 clk delay required! */
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udelay(1 + ((3 * USEC_PER_SEC) /
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(host->clk_rate ? host->clk_rate : msmsdcc_fmin)));
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}
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static void
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msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd,
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u32 c);
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static void msmsdcc_reset_and_restore(struct msmsdcc_host *host)
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{
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u32 mci_clk = 0;
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u32 mci_mask0 = 0;
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int ret = 0;
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/* Save the controller state */
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mci_clk = readl(host->base + MMCICLOCK);
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mci_mask0 = readl(host->base + MMCIMASK0);
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/* Reset the controller */
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ret = clk_reset(host->clk, CLK_RESET_ASSERT);
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if (ret)
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pr_err("%s: Clock assert failed at %u Hz with err %d\n",
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mmc_hostname(host->mmc), host->clk_rate, ret);
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ret = clk_reset(host->clk, CLK_RESET_DEASSERT);
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if (ret)
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pr_err("%s: Clock deassert failed at %u Hz with err %d\n",
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mmc_hostname(host->mmc), host->clk_rate, ret);
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pr_info("%s: Controller has been re-initialiazed\n",
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mmc_hostname(host->mmc));
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/* Restore the contoller state */
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writel(host->pwr, host->base + MMCIPOWER);
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writel(mci_clk, host->base + MMCICLOCK);
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writel(mci_mask0, host->base + MMCIMASK0);
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ret = clk_set_rate(host->clk, host->clk_rate);
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if (ret)
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pr_err("%s: Failed to set clk rate %u Hz (%d)\n",
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mmc_hostname(host->mmc), host->clk_rate, ret);
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}
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static void
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msmsdcc_request_end(struct msmsdcc_host *host, struct mmc_request *mrq)
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{
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BUG_ON(host->curr.data);
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host->curr.mrq = NULL;
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host->curr.cmd = NULL;
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if (mrq->data)
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mrq->data->bytes_xfered = host->curr.data_xfered;
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if (mrq->cmd->error == -ETIMEDOUT)
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mdelay(5);
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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/*
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* Need to drop the host lock here; mmc_request_done may call
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* back into the driver...
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*/
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spin_unlock(&host->lock);
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mmc_request_done(host->mmc, mrq);
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spin_lock(&host->lock);
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}
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static void
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msmsdcc_stop_data(struct msmsdcc_host *host)
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{
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host->curr.data = NULL;
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host->curr.got_dataend = 0;
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}
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uint32_t msmsdcc_fifo_addr(struct msmsdcc_host *host)
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{
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return host->memres->start + MMCIFIFO;
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}
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static inline void
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msmsdcc_start_command_exec(struct msmsdcc_host *host, u32 arg, u32 c) {
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msmsdcc_writel(host, arg, MMCIARGUMENT);
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msmsdcc_writel(host, c, MMCICOMMAND);
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}
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static void
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msmsdcc_dma_exec_func(struct msm_dmov_cmd *cmd)
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{
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struct msmsdcc_host *host = (struct msmsdcc_host *)cmd->data;
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msmsdcc_writel(host, host->cmd_timeout, MMCIDATATIMER);
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msmsdcc_writel(host, (unsigned int)host->curr.xfer_size,
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MMCIDATALENGTH);
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msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) &
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(~MCI_IRQ_PIO)) | host->cmd_pio_irqmask, MMCIMASK0);
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msmsdcc_writel(host, host->cmd_datactrl, MMCIDATACTRL);
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if (host->cmd_cmd) {
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msmsdcc_start_command_exec(host,
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(u32) host->cmd_cmd->arg,
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(u32) host->cmd_c);
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}
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host->dma.active = 1;
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}
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static void
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msmsdcc_dma_complete_tlet(unsigned long data)
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{
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struct msmsdcc_host *host = (struct msmsdcc_host *)data;
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unsigned long flags;
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struct mmc_request *mrq;
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struct msm_dmov_errdata err;
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spin_lock_irqsave(&host->lock, flags);
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host->dma.active = 0;
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err = host->dma.err;
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mrq = host->curr.mrq;
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BUG_ON(!mrq);
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WARN_ON(!mrq->data);
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if (!(host->dma.result & DMOV_RSLT_VALID)) {
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pr_err("msmsdcc: Invalid DataMover result\n");
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goto out;
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}
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if (host->dma.result & DMOV_RSLT_DONE) {
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host->curr.data_xfered = host->curr.xfer_size;
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} else {
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/* Error or flush */
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if (host->dma.result & DMOV_RSLT_ERROR)
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pr_err("%s: DMA error (0x%.8x)\n",
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mmc_hostname(host->mmc), host->dma.result);
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if (host->dma.result & DMOV_RSLT_FLUSH)
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pr_err("%s: DMA channel flushed (0x%.8x)\n",
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mmc_hostname(host->mmc), host->dma.result);
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pr_err("Flush data: %.8x %.8x %.8x %.8x %.8x %.8x\n",
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err.flush[0], err.flush[1], err.flush[2],
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err.flush[3], err.flush[4], err.flush[5]);
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msmsdcc_reset_and_restore(host);
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if (!mrq->data->error)
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mrq->data->error = -EIO;
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}
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dma_unmap_sg(mmc_dev(host->mmc), host->dma.sg, host->dma.num_ents,
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host->dma.dir);
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host->dma.sg = NULL;
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host->dma.busy = 0;
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if (host->curr.got_dataend || mrq->data->error) {
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/*
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* If we've already gotten our DATAEND / DATABLKEND
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* for this request, then complete it through here.
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*/
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msmsdcc_stop_data(host);
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if (!mrq->data->error)
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host->curr.data_xfered = host->curr.xfer_size;
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if (!mrq->data->stop || mrq->cmd->error) {
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host->curr.mrq = NULL;
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host->curr.cmd = NULL;
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mrq->data->bytes_xfered = host->curr.data_xfered;
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spin_unlock_irqrestore(&host->lock, flags);
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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mmc_request_done(host->mmc, mrq);
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return;
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} else
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msmsdcc_start_command(host, mrq->data->stop, 0);
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}
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out:
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spin_unlock_irqrestore(&host->lock, flags);
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return;
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}
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static void
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msmsdcc_dma_complete_func(struct msm_dmov_cmd *cmd,
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unsigned int result,
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struct msm_dmov_errdata *err)
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{
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struct msmsdcc_dma_data *dma_data =
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container_of(cmd, struct msmsdcc_dma_data, hdr);
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struct msmsdcc_host *host = dma_data->host;
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dma_data->result = result;
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if (err)
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memcpy(&dma_data->err, err, sizeof(struct msm_dmov_errdata));
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tasklet_schedule(&host->dma_tlet);
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}
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static int validate_dma(struct msmsdcc_host *host, struct mmc_data *data)
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{
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if (host->dma.channel == -1)
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return -ENOENT;
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if ((data->blksz * data->blocks) < MCI_FIFOSIZE)
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return -EINVAL;
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if ((data->blksz * data->blocks) % MCI_FIFOSIZE)
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return -EINVAL;
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return 0;
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}
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static int msmsdcc_config_dma(struct msmsdcc_host *host, struct mmc_data *data)
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{
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struct msmsdcc_nc_dmadata *nc;
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dmov_box *box;
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uint32_t rows;
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uint32_t crci;
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unsigned int n;
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int i, rc;
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struct scatterlist *sg = data->sg;
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rc = validate_dma(host, data);
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if (rc)
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return rc;
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host->dma.sg = data->sg;
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host->dma.num_ents = data->sg_len;
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BUG_ON(host->dma.num_ents > NR_SG); /* Prevent memory corruption */
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nc = host->dma.nc;
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switch (host->pdev_id) {
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case 1:
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crci = MSMSDCC_CRCI_SDC1;
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break;
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case 2:
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crci = MSMSDCC_CRCI_SDC2;
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break;
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case 3:
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crci = MSMSDCC_CRCI_SDC3;
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break;
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case 4:
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crci = MSMSDCC_CRCI_SDC4;
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break;
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default:
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host->dma.sg = NULL;
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host->dma.num_ents = 0;
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return -ENOENT;
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}
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if (data->flags & MMC_DATA_READ)
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host->dma.dir = DMA_FROM_DEVICE;
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else
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host->dma.dir = DMA_TO_DEVICE;
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host->curr.user_pages = 0;
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box = &nc->cmd[0];
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/* location of command block must be 64 bit aligned */
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BUG_ON(host->dma.cmd_busaddr & 0x07);
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nc->cmdptr = (host->dma.cmd_busaddr >> 3) | CMD_PTR_LP;
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host->dma.hdr.cmdptr = DMOV_CMD_PTR_LIST |
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DMOV_CMD_ADDR(host->dma.cmdptr_busaddr);
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host->dma.hdr.complete_func = msmsdcc_dma_complete_func;
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n = dma_map_sg(mmc_dev(host->mmc), host->dma.sg,
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host->dma.num_ents, host->dma.dir);
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if (n == 0) {
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pr_err("%s: Unable to map in all sg elements\n",
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mmc_hostname(host->mmc));
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host->dma.sg = NULL;
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host->dma.num_ents = 0;
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return -ENOMEM;
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}
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for_each_sg(host->dma.sg, sg, n, i) {
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box->cmd = CMD_MODE_BOX;
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if (i == n - 1)
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box->cmd |= CMD_LC;
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rows = (sg_dma_len(sg) % MCI_FIFOSIZE) ?
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(sg_dma_len(sg) / MCI_FIFOSIZE) + 1 :
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(sg_dma_len(sg) / MCI_FIFOSIZE) ;
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if (data->flags & MMC_DATA_READ) {
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box->src_row_addr = msmsdcc_fifo_addr(host);
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box->dst_row_addr = sg_dma_address(sg);
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box->src_dst_len = (MCI_FIFOSIZE << 16) |
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(MCI_FIFOSIZE);
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box->row_offset = MCI_FIFOSIZE;
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box->num_rows = rows * ((1 << 16) + 1);
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box->cmd |= CMD_SRC_CRCI(crci);
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} else {
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box->src_row_addr = sg_dma_address(sg);
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box->dst_row_addr = msmsdcc_fifo_addr(host);
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box->src_dst_len = (MCI_FIFOSIZE << 16) |
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(MCI_FIFOSIZE);
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box->row_offset = (MCI_FIFOSIZE << 16);
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box->num_rows = rows * ((1 << 16) + 1);
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box->cmd |= CMD_DST_CRCI(crci);
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}
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box++;
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}
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return 0;
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}
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static int
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snoop_cccr_abort(struct mmc_command *cmd)
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{
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if ((cmd->opcode == 52) &&
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(cmd->arg & 0x80000000) &&
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(((cmd->arg >> 9) & 0x1ffff) == SDIO_CCCR_ABORT))
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return 1;
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return 0;
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}
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static void
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msmsdcc_start_command_deferred(struct msmsdcc_host *host,
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struct mmc_command *cmd, u32 *c)
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{
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*c |= (cmd->opcode | MCI_CPSM_ENABLE);
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if (cmd->flags & MMC_RSP_PRESENT) {
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if (cmd->flags & MMC_RSP_136)
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*c |= MCI_CPSM_LONGRSP;
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*c |= MCI_CPSM_RESPONSE;
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}
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if (/*interrupt*/0)
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*c |= MCI_CPSM_INTERRUPT;
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if ((((cmd->opcode == 17) || (cmd->opcode == 18)) ||
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((cmd->opcode == 24) || (cmd->opcode == 25))) ||
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(cmd->opcode == 53))
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*c |= MCI_CSPM_DATCMD;
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if (host->prog_scan && (cmd->opcode == 12)) {
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*c |= MCI_CPSM_PROGENA;
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host->prog_enable = true;
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}
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if (cmd == cmd->mrq->stop)
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*c |= MCI_CSPM_MCIABORT;
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if (snoop_cccr_abort(cmd))
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*c |= MCI_CSPM_MCIABORT;
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if (host->curr.cmd != NULL) {
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pr_err("%s: Overlapping command requests\n",
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mmc_hostname(host->mmc));
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}
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host->curr.cmd = cmd;
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}
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|
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static void
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msmsdcc_start_data(struct msmsdcc_host *host, struct mmc_data *data,
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struct mmc_command *cmd, u32 c)
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{
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unsigned int datactrl, timeout;
|
|
unsigned long long clks;
|
|
unsigned int pio_irqmask = 0;
|
|
|
|
host->curr.data = data;
|
|
host->curr.xfer_size = data->blksz * data->blocks;
|
|
host->curr.xfer_remain = host->curr.xfer_size;
|
|
host->curr.data_xfered = 0;
|
|
host->curr.got_dataend = 0;
|
|
|
|
memset(&host->pio, 0, sizeof(host->pio));
|
|
|
|
datactrl = MCI_DPSM_ENABLE | (data->blksz << 4);
|
|
|
|
if (!msmsdcc_config_dma(host, data))
|
|
datactrl |= MCI_DPSM_DMAENABLE;
|
|
else {
|
|
host->pio.sg = data->sg;
|
|
host->pio.sg_len = data->sg_len;
|
|
host->pio.sg_off = 0;
|
|
|
|
if (data->flags & MMC_DATA_READ) {
|
|
pio_irqmask = MCI_RXFIFOHALFFULLMASK;
|
|
if (host->curr.xfer_remain < MCI_FIFOSIZE)
|
|
pio_irqmask |= MCI_RXDATAAVLBLMASK;
|
|
} else
|
|
pio_irqmask = MCI_TXFIFOHALFEMPTYMASK;
|
|
}
|
|
|
|
if (data->flags & MMC_DATA_READ)
|
|
datactrl |= MCI_DPSM_DIRECTION;
|
|
|
|
clks = (unsigned long long)data->timeout_ns * host->clk_rate;
|
|
do_div(clks, NSEC_PER_SEC);
|
|
timeout = data->timeout_clks + (unsigned int)clks*2 ;
|
|
|
|
if (datactrl & MCI_DPSM_DMAENABLE) {
|
|
/* Save parameters for the exec function */
|
|
host->cmd_timeout = timeout;
|
|
host->cmd_pio_irqmask = pio_irqmask;
|
|
host->cmd_datactrl = datactrl;
|
|
host->cmd_cmd = cmd;
|
|
|
|
host->dma.hdr.execute_func = msmsdcc_dma_exec_func;
|
|
host->dma.hdr.data = (void *)host;
|
|
host->dma.busy = 1;
|
|
|
|
if (cmd) {
|
|
msmsdcc_start_command_deferred(host, cmd, &c);
|
|
host->cmd_c = c;
|
|
}
|
|
msm_dmov_enqueue_cmd(host->dma.channel, &host->dma.hdr);
|
|
if (data->flags & MMC_DATA_WRITE)
|
|
host->prog_scan = true;
|
|
} else {
|
|
msmsdcc_writel(host, timeout, MMCIDATATIMER);
|
|
|
|
msmsdcc_writel(host, host->curr.xfer_size, MMCIDATALENGTH);
|
|
|
|
msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) &
|
|
(~MCI_IRQ_PIO)) | pio_irqmask, MMCIMASK0);
|
|
|
|
msmsdcc_writel(host, datactrl, MMCIDATACTRL);
|
|
|
|
if (cmd) {
|
|
/* Daisy-chain the command if requested */
|
|
msmsdcc_start_command(host, cmd, c);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd, u32 c)
|
|
{
|
|
if (cmd == cmd->mrq->stop)
|
|
c |= MCI_CSPM_MCIABORT;
|
|
|
|
host->stats.cmds++;
|
|
|
|
msmsdcc_start_command_deferred(host, cmd, &c);
|
|
msmsdcc_start_command_exec(host, cmd->arg, c);
|
|
}
|
|
|
|
static void
|
|
msmsdcc_data_err(struct msmsdcc_host *host, struct mmc_data *data,
|
|
unsigned int status)
|
|
{
|
|
if (status & MCI_DATACRCFAIL) {
|
|
pr_err("%s: Data CRC error\n", mmc_hostname(host->mmc));
|
|
pr_err("%s: opcode 0x%.8x\n", __func__,
|
|
data->mrq->cmd->opcode);
|
|
pr_err("%s: blksz %d, blocks %d\n", __func__,
|
|
data->blksz, data->blocks);
|
|
data->error = -EILSEQ;
|
|
} else if (status & MCI_DATATIMEOUT) {
|
|
pr_err("%s: Data timeout\n", mmc_hostname(host->mmc));
|
|
data->error = -ETIMEDOUT;
|
|
} else if (status & MCI_RXOVERRUN) {
|
|
pr_err("%s: RX overrun\n", mmc_hostname(host->mmc));
|
|
data->error = -EIO;
|
|
} else if (status & MCI_TXUNDERRUN) {
|
|
pr_err("%s: TX underrun\n", mmc_hostname(host->mmc));
|
|
data->error = -EIO;
|
|
} else {
|
|
pr_err("%s: Unknown error (0x%.8x)\n",
|
|
mmc_hostname(host->mmc), status);
|
|
data->error = -EIO;
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
msmsdcc_pio_read(struct msmsdcc_host *host, char *buffer, unsigned int remain)
|
|
{
|
|
uint32_t *ptr = (uint32_t *) buffer;
|
|
int count = 0;
|
|
|
|
if (remain % 4)
|
|
remain = ((remain >> 2) + 1) << 2;
|
|
|
|
while (msmsdcc_readl(host, MMCISTATUS) & MCI_RXDATAAVLBL) {
|
|
*ptr = msmsdcc_readl(host, MMCIFIFO + (count % MCI_FIFOSIZE));
|
|
ptr++;
|
|
count += sizeof(uint32_t);
|
|
|
|
remain -= sizeof(uint32_t);
|
|
if (remain == 0)
|
|
break;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static int
|
|
msmsdcc_pio_write(struct msmsdcc_host *host, char *buffer,
|
|
unsigned int remain, u32 status)
|
|
{
|
|
void __iomem *base = host->base;
|
|
char *ptr = buffer;
|
|
|
|
do {
|
|
unsigned int count, maxcnt, sz;
|
|
|
|
maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE :
|
|
MCI_FIFOHALFSIZE;
|
|
count = min(remain, maxcnt);
|
|
|
|
sz = count % 4 ? (count >> 2) + 1 : (count >> 2);
|
|
writesl(base + MMCIFIFO, ptr, sz);
|
|
ptr += count;
|
|
remain -= count;
|
|
|
|
if (remain == 0)
|
|
break;
|
|
|
|
status = msmsdcc_readl(host, MMCISTATUS);
|
|
} while (status & MCI_TXFIFOHALFEMPTY);
|
|
|
|
return ptr - buffer;
|
|
}
|
|
|
|
static int
|
|
msmsdcc_spin_on_status(struct msmsdcc_host *host, uint32_t mask, int maxspin)
|
|
{
|
|
while (maxspin) {
|
|
if ((msmsdcc_readl(host, MMCISTATUS) & mask))
|
|
return 0;
|
|
udelay(1);
|
|
--maxspin;
|
|
}
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static irqreturn_t
|
|
msmsdcc_pio_irq(int irq, void *dev_id)
|
|
{
|
|
struct msmsdcc_host *host = dev_id;
|
|
uint32_t status;
|
|
u32 mci_mask0;
|
|
|
|
status = msmsdcc_readl(host, MMCISTATUS);
|
|
mci_mask0 = msmsdcc_readl(host, MMCIMASK0);
|
|
|
|
if (((mci_mask0 & status) & MCI_IRQ_PIO) == 0)
|
|
return IRQ_NONE;
|
|
|
|
do {
|
|
unsigned long flags;
|
|
unsigned int remain, len;
|
|
char *buffer;
|
|
|
|
if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) {
|
|
if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll)
|
|
break;
|
|
|
|
if (msmsdcc_spin_on_status(host,
|
|
(MCI_TXFIFOHALFEMPTY |
|
|
MCI_RXDATAAVLBL),
|
|
PIO_SPINMAX)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Map the current scatter buffer */
|
|
local_irq_save(flags);
|
|
buffer = kmap_atomic(sg_page(host->pio.sg))
|
|
+ host->pio.sg->offset;
|
|
buffer += host->pio.sg_off;
|
|
remain = host->pio.sg->length - host->pio.sg_off;
|
|
len = 0;
|
|
if (status & MCI_RXACTIVE)
|
|
len = msmsdcc_pio_read(host, buffer, remain);
|
|
if (status & MCI_TXACTIVE)
|
|
len = msmsdcc_pio_write(host, buffer, remain, status);
|
|
|
|
/* Unmap the buffer */
|
|
kunmap_atomic(buffer);
|
|
local_irq_restore(flags);
|
|
|
|
host->pio.sg_off += len;
|
|
host->curr.xfer_remain -= len;
|
|
host->curr.data_xfered += len;
|
|
remain -= len;
|
|
|
|
if (remain == 0) {
|
|
/* This sg page is full - do some housekeeping */
|
|
if (status & MCI_RXACTIVE && host->curr.user_pages)
|
|
flush_dcache_page(sg_page(host->pio.sg));
|
|
|
|
if (!--host->pio.sg_len) {
|
|
memset(&host->pio, 0, sizeof(host->pio));
|
|
break;
|
|
}
|
|
|
|
/* Advance to next sg */
|
|
host->pio.sg++;
|
|
host->pio.sg_off = 0;
|
|
}
|
|
|
|
status = msmsdcc_readl(host, MMCISTATUS);
|
|
} while (1);
|
|
|
|
if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
|
|
msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) |
|
|
MCI_RXDATAAVLBLMASK, MMCIMASK0);
|
|
|
|
if (!host->curr.xfer_remain)
|
|
msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) | 0,
|
|
MMCIMASK0);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void msmsdcc_do_cmdirq(struct msmsdcc_host *host, uint32_t status)
|
|
{
|
|
struct mmc_command *cmd = host->curr.cmd;
|
|
|
|
host->curr.cmd = NULL;
|
|
cmd->resp[0] = msmsdcc_readl(host, MMCIRESPONSE0);
|
|
cmd->resp[1] = msmsdcc_readl(host, MMCIRESPONSE1);
|
|
cmd->resp[2] = msmsdcc_readl(host, MMCIRESPONSE2);
|
|
cmd->resp[3] = msmsdcc_readl(host, MMCIRESPONSE3);
|
|
|
|
if (status & MCI_CMDTIMEOUT) {
|
|
cmd->error = -ETIMEDOUT;
|
|
} else if (status & MCI_CMDCRCFAIL &&
|
|
cmd->flags & MMC_RSP_CRC) {
|
|
pr_err("%s: Command CRC error\n", mmc_hostname(host->mmc));
|
|
cmd->error = -EILSEQ;
|
|
}
|
|
|
|
if (!cmd->data || cmd->error) {
|
|
if (host->curr.data && host->dma.sg)
|
|
msm_dmov_stop_cmd(host->dma.channel,
|
|
&host->dma.hdr, 0);
|
|
else if (host->curr.data) { /* Non DMA */
|
|
msmsdcc_reset_and_restore(host);
|
|
msmsdcc_stop_data(host);
|
|
msmsdcc_request_end(host, cmd->mrq);
|
|
} else { /* host->data == NULL */
|
|
if (!cmd->error && host->prog_enable) {
|
|
if (status & MCI_PROGDONE) {
|
|
host->prog_scan = false;
|
|
host->prog_enable = false;
|
|
msmsdcc_request_end(host, cmd->mrq);
|
|
} else {
|
|
host->curr.cmd = cmd;
|
|
}
|
|
} else {
|
|
if (host->prog_enable) {
|
|
host->prog_scan = false;
|
|
host->prog_enable = false;
|
|
}
|
|
msmsdcc_request_end(host, cmd->mrq);
|
|
}
|
|
}
|
|
} else if (cmd->data)
|
|
if (!(cmd->data->flags & MMC_DATA_READ))
|
|
msmsdcc_start_data(host, cmd->data,
|
|
NULL, 0);
|
|
}
|
|
|
|
static void
|
|
msmsdcc_handle_irq_data(struct msmsdcc_host *host, u32 status,
|
|
void __iomem *base)
|
|
{
|
|
struct mmc_data *data = host->curr.data;
|
|
|
|
if (status & (MCI_CMDSENT | MCI_CMDRESPEND | MCI_CMDCRCFAIL |
|
|
MCI_CMDTIMEOUT | MCI_PROGDONE) && host->curr.cmd) {
|
|
msmsdcc_do_cmdirq(host, status);
|
|
}
|
|
|
|
if (!data)
|
|
return;
|
|
|
|
/* Check for data errors */
|
|
if (status & (MCI_DATACRCFAIL | MCI_DATATIMEOUT |
|
|
MCI_TXUNDERRUN | MCI_RXOVERRUN)) {
|
|
msmsdcc_data_err(host, data, status);
|
|
host->curr.data_xfered = 0;
|
|
if (host->dma.sg)
|
|
msm_dmov_stop_cmd(host->dma.channel,
|
|
&host->dma.hdr, 0);
|
|
else {
|
|
msmsdcc_reset_and_restore(host);
|
|
if (host->curr.data)
|
|
msmsdcc_stop_data(host);
|
|
if (!data->stop)
|
|
msmsdcc_request_end(host, data->mrq);
|
|
else
|
|
msmsdcc_start_command(host, data->stop, 0);
|
|
}
|
|
}
|
|
|
|
/* Check for data done */
|
|
if (!host->curr.got_dataend && (status & MCI_DATAEND))
|
|
host->curr.got_dataend = 1;
|
|
|
|
/*
|
|
* If DMA is still in progress, we complete via the completion handler
|
|
*/
|
|
if (host->curr.got_dataend && !host->dma.busy) {
|
|
/*
|
|
* There appears to be an issue in the controller where
|
|
* if you request a small block transfer (< fifo size),
|
|
* you may get your DATAEND/DATABLKEND irq without the
|
|
* PIO data irq.
|
|
*
|
|
* Check to see if there is still data to be read,
|
|
* and simulate a PIO irq.
|
|
*/
|
|
if (readl(base + MMCISTATUS) & MCI_RXDATAAVLBL)
|
|
msmsdcc_pio_irq(1, host);
|
|
|
|
msmsdcc_stop_data(host);
|
|
if (!data->error)
|
|
host->curr.data_xfered = host->curr.xfer_size;
|
|
|
|
if (!data->stop)
|
|
msmsdcc_request_end(host, data->mrq);
|
|
else
|
|
msmsdcc_start_command(host, data->stop, 0);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t
|
|
msmsdcc_irq(int irq, void *dev_id)
|
|
{
|
|
struct msmsdcc_host *host = dev_id;
|
|
void __iomem *base = host->base;
|
|
u32 status;
|
|
int ret = 0;
|
|
int cardint = 0;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
do {
|
|
status = msmsdcc_readl(host, MMCISTATUS);
|
|
status &= msmsdcc_readl(host, MMCIMASK0);
|
|
if ((status & (~MCI_IRQ_PIO)) == 0)
|
|
break;
|
|
msmsdcc_writel(host, status, MMCICLEAR);
|
|
|
|
if (status & MCI_SDIOINTR)
|
|
status &= ~MCI_SDIOINTR;
|
|
|
|
if (!status)
|
|
break;
|
|
|
|
msmsdcc_handle_irq_data(host, status, base);
|
|
|
|
if (status & MCI_SDIOINTOPER) {
|
|
cardint = 1;
|
|
status &= ~MCI_SDIOINTOPER;
|
|
}
|
|
ret = 1;
|
|
} while (status);
|
|
|
|
spin_unlock(&host->lock);
|
|
|
|
/*
|
|
* We have to delay handling the card interrupt as it calls
|
|
* back into the driver.
|
|
*/
|
|
if (cardint)
|
|
mmc_signal_sdio_irq(host->mmc);
|
|
|
|
return IRQ_RETVAL(ret);
|
|
}
|
|
|
|
static void
|
|
msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
|
{
|
|
struct msmsdcc_host *host = mmc_priv(mmc);
|
|
unsigned long flags;
|
|
|
|
WARN_ON(host->curr.mrq != NULL);
|
|
WARN_ON(host->pwr == 0);
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
host->stats.reqs++;
|
|
|
|
if (host->eject) {
|
|
if (mrq->data && !(mrq->data->flags & MMC_DATA_READ)) {
|
|
mrq->cmd->error = 0;
|
|
mrq->data->bytes_xfered = mrq->data->blksz *
|
|
mrq->data->blocks;
|
|
} else
|
|
mrq->cmd->error = -ENOMEDIUM;
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
mmc_request_done(mmc, mrq);
|
|
return;
|
|
}
|
|
|
|
msmsdcc_enable_clocks(host);
|
|
|
|
host->curr.mrq = mrq;
|
|
|
|
if (mrq->data && mrq->data->flags & MMC_DATA_READ)
|
|
/* Queue/read data, daisy-chain command when data starts */
|
|
msmsdcc_start_data(host, mrq->data, mrq->cmd, 0);
|
|
else
|
|
msmsdcc_start_command(host, mrq->cmd, 0);
|
|
|
|
if (host->cmdpoll && !msmsdcc_spin_on_status(host,
|
|
MCI_CMDRESPEND|MCI_CMDCRCFAIL|MCI_CMDTIMEOUT,
|
|
CMD_SPINMAX)) {
|
|
uint32_t status = msmsdcc_readl(host, MMCISTATUS);
|
|
msmsdcc_do_cmdirq(host, status);
|
|
msmsdcc_writel(host,
|
|
MCI_CMDRESPEND | MCI_CMDCRCFAIL | MCI_CMDTIMEOUT,
|
|
MMCICLEAR);
|
|
host->stats.cmdpoll_hits++;
|
|
} else {
|
|
host->stats.cmdpoll_misses++;
|
|
}
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static void msmsdcc_setup_gpio(struct msmsdcc_host *host, bool enable)
|
|
{
|
|
struct msm_mmc_gpio_data *curr;
|
|
int i, rc = 0;
|
|
|
|
if (!host->plat->gpio_data || host->gpio_config_status == enable)
|
|
return;
|
|
|
|
curr = host->plat->gpio_data;
|
|
for (i = 0; i < curr->size; i++) {
|
|
if (enable) {
|
|
rc = gpio_request(curr->gpio[i].no,
|
|
curr->gpio[i].name);
|
|
if (rc) {
|
|
pr_err("%s: gpio_request(%d, %s) failed %d\n",
|
|
mmc_hostname(host->mmc),
|
|
curr->gpio[i].no,
|
|
curr->gpio[i].name, rc);
|
|
goto free_gpios;
|
|
}
|
|
} else {
|
|
gpio_free(curr->gpio[i].no);
|
|
}
|
|
}
|
|
host->gpio_config_status = enable;
|
|
return;
|
|
|
|
free_gpios:
|
|
for (; i >= 0; i--)
|
|
gpio_free(curr->gpio[i].no);
|
|
}
|
|
|
|
static void
|
|
msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct msmsdcc_host *host = mmc_priv(mmc);
|
|
u32 clk = 0, pwr = 0;
|
|
int rc;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
msmsdcc_enable_clocks(host);
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
if (ios->clock) {
|
|
if (ios->clock != host->clk_rate) {
|
|
rc = clk_set_rate(host->clk, ios->clock);
|
|
if (rc < 0)
|
|
pr_err("%s: Error setting clock rate (%d)\n",
|
|
mmc_hostname(host->mmc), rc);
|
|
else
|
|
host->clk_rate = ios->clock;
|
|
}
|
|
clk |= MCI_CLK_ENABLE;
|
|
}
|
|
|
|
if (ios->bus_width == MMC_BUS_WIDTH_4)
|
|
clk |= (2 << 10); /* Set WIDEBUS */
|
|
|
|
if (ios->clock > 400000 && msmsdcc_pwrsave)
|
|
clk |= (1 << 9); /* PWRSAVE */
|
|
|
|
clk |= (1 << 12); /* FLOW_ENA */
|
|
clk |= (1 << 15); /* feedback clock */
|
|
|
|
if (host->plat->translate_vdd)
|
|
pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
|
|
|
|
switch (ios->power_mode) {
|
|
case MMC_POWER_OFF:
|
|
msmsdcc_setup_gpio(host, false);
|
|
break;
|
|
case MMC_POWER_UP:
|
|
pwr |= MCI_PWR_UP;
|
|
msmsdcc_setup_gpio(host, true);
|
|
break;
|
|
case MMC_POWER_ON:
|
|
pwr |= MCI_PWR_ON;
|
|
break;
|
|
}
|
|
|
|
if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
|
|
pwr |= MCI_OD;
|
|
|
|
msmsdcc_writel(host, clk, MMCICLOCK);
|
|
|
|
if (host->pwr != pwr) {
|
|
host->pwr = pwr;
|
|
msmsdcc_writel(host, pwr, MMCIPOWER);
|
|
}
|
|
#if BUSCLK_PWRSAVE
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
msmsdcc_disable_clocks(host, 1);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
#endif
|
|
}
|
|
|
|
static void msmsdcc_enable_sdio_irq(struct mmc_host *mmc, int enable)
|
|
{
|
|
struct msmsdcc_host *host = mmc_priv(mmc);
|
|
unsigned long flags;
|
|
u32 status;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
if (msmsdcc_sdioirq == 1) {
|
|
status = msmsdcc_readl(host, MMCIMASK0);
|
|
if (enable)
|
|
status |= MCI_SDIOINTOPERMASK;
|
|
else
|
|
status &= ~MCI_SDIOINTOPERMASK;
|
|
host->saved_irq0mask = status;
|
|
msmsdcc_writel(host, status, MMCIMASK0);
|
|
}
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static void msmsdcc_init_card(struct mmc_host *mmc, struct mmc_card *card)
|
|
{
|
|
struct msmsdcc_host *host = mmc_priv(mmc);
|
|
|
|
if (host->plat->init_card)
|
|
host->plat->init_card(card);
|
|
}
|
|
|
|
static const struct mmc_host_ops msmsdcc_ops = {
|
|
.request = msmsdcc_request,
|
|
.set_ios = msmsdcc_set_ios,
|
|
.enable_sdio_irq = msmsdcc_enable_sdio_irq,
|
|
.init_card = msmsdcc_init_card,
|
|
};
|
|
|
|
static void
|
|
msmsdcc_check_status(unsigned long data)
|
|
{
|
|
struct msmsdcc_host *host = (struct msmsdcc_host *)data;
|
|
unsigned int status;
|
|
|
|
if (!host->plat->status) {
|
|
mmc_detect_change(host->mmc, 0);
|
|
goto out;
|
|
}
|
|
|
|
status = host->plat->status(mmc_dev(host->mmc));
|
|
host->eject = !status;
|
|
if (status ^ host->oldstat) {
|
|
pr_info("%s: Slot status change detected (%d -> %d)\n",
|
|
mmc_hostname(host->mmc), host->oldstat, status);
|
|
if (status)
|
|
mmc_detect_change(host->mmc, (5 * HZ) / 2);
|
|
else
|
|
mmc_detect_change(host->mmc, 0);
|
|
}
|
|
|
|
host->oldstat = status;
|
|
|
|
out:
|
|
if (host->timer.function)
|
|
mod_timer(&host->timer, jiffies + HZ);
|
|
}
|
|
|
|
static irqreturn_t
|
|
msmsdcc_platform_status_irq(int irq, void *dev_id)
|
|
{
|
|
struct msmsdcc_host *host = dev_id;
|
|
|
|
pr_debug("%s: %d\n", __func__, irq);
|
|
msmsdcc_check_status((unsigned long) host);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void
|
|
msmsdcc_status_notify_cb(int card_present, void *dev_id)
|
|
{
|
|
struct msmsdcc_host *host = dev_id;
|
|
|
|
pr_debug("%s: card_present %d\n", mmc_hostname(host->mmc),
|
|
card_present);
|
|
msmsdcc_check_status((unsigned long) host);
|
|
}
|
|
|
|
static void
|
|
msmsdcc_busclk_expired(unsigned long _data)
|
|
{
|
|
struct msmsdcc_host *host = (struct msmsdcc_host *) _data;
|
|
|
|
if (host->clks_on)
|
|
msmsdcc_disable_clocks(host, 0);
|
|
}
|
|
|
|
static int
|
|
msmsdcc_init_dma(struct msmsdcc_host *host)
|
|
{
|
|
memset(&host->dma, 0, sizeof(struct msmsdcc_dma_data));
|
|
host->dma.host = host;
|
|
host->dma.channel = -1;
|
|
|
|
if (!host->dmares)
|
|
return -ENODEV;
|
|
|
|
host->dma.nc = dma_alloc_coherent(NULL,
|
|
sizeof(struct msmsdcc_nc_dmadata),
|
|
&host->dma.nc_busaddr,
|
|
GFP_KERNEL);
|
|
if (host->dma.nc == NULL) {
|
|
pr_err("Unable to allocate DMA buffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(host->dma.nc, 0x00, sizeof(struct msmsdcc_nc_dmadata));
|
|
host->dma.cmd_busaddr = host->dma.nc_busaddr;
|
|
host->dma.cmdptr_busaddr = host->dma.nc_busaddr +
|
|
offsetof(struct msmsdcc_nc_dmadata, cmdptr);
|
|
host->dma.channel = host->dmares->start;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
msmsdcc_probe(struct platform_device *pdev)
|
|
{
|
|
struct msm_mmc_platform_data *plat = pdev->dev.platform_data;
|
|
struct msmsdcc_host *host;
|
|
struct mmc_host *mmc;
|
|
struct resource *cmd_irqres = NULL;
|
|
struct resource *stat_irqres = NULL;
|
|
struct resource *memres = NULL;
|
|
struct resource *dmares = NULL;
|
|
int ret;
|
|
|
|
/* must have platform data */
|
|
if (!plat) {
|
|
pr_err("%s: Platform data not available\n", __func__);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (pdev->id < 1 || pdev->id > 4)
|
|
return -EINVAL;
|
|
|
|
if (pdev->resource == NULL || pdev->num_resources < 2) {
|
|
pr_err("%s: Invalid resource\n", __func__);
|
|
return -ENXIO;
|
|
}
|
|
|
|
memres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
|
|
cmd_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
|
|
"cmd_irq");
|
|
stat_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
|
|
"status_irq");
|
|
|
|
if (!cmd_irqres || !memres) {
|
|
pr_err("%s: Invalid resource\n", __func__);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/*
|
|
* Setup our host structure
|
|
*/
|
|
|
|
mmc = mmc_alloc_host(sizeof(struct msmsdcc_host), &pdev->dev);
|
|
if (!mmc) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
host = mmc_priv(mmc);
|
|
host->pdev_id = pdev->id;
|
|
host->plat = plat;
|
|
host->mmc = mmc;
|
|
host->curr.cmd = NULL;
|
|
init_timer(&host->busclk_timer);
|
|
host->busclk_timer.data = (unsigned long) host;
|
|
host->busclk_timer.function = msmsdcc_busclk_expired;
|
|
|
|
|
|
host->cmdpoll = 1;
|
|
|
|
host->base = ioremap(memres->start, PAGE_SIZE);
|
|
if (!host->base) {
|
|
ret = -ENOMEM;
|
|
goto host_free;
|
|
}
|
|
|
|
host->cmd_irqres = cmd_irqres;
|
|
host->memres = memres;
|
|
host->dmares = dmares;
|
|
spin_lock_init(&host->lock);
|
|
|
|
tasklet_init(&host->dma_tlet, msmsdcc_dma_complete_tlet,
|
|
(unsigned long)host);
|
|
|
|
/*
|
|
* Setup DMA
|
|
*/
|
|
if (host->dmares) {
|
|
ret = msmsdcc_init_dma(host);
|
|
if (ret)
|
|
goto ioremap_free;
|
|
} else {
|
|
host->dma.channel = -1;
|
|
}
|
|
|
|
/* Get our clocks */
|
|
host->pclk = clk_get(&pdev->dev, "sdc_pclk");
|
|
if (IS_ERR(host->pclk)) {
|
|
ret = PTR_ERR(host->pclk);
|
|
goto dma_free;
|
|
}
|
|
|
|
host->clk = clk_get(&pdev->dev, "sdc_clk");
|
|
if (IS_ERR(host->clk)) {
|
|
ret = PTR_ERR(host->clk);
|
|
goto pclk_put;
|
|
}
|
|
|
|
ret = clk_set_rate(host->clk, msmsdcc_fmin);
|
|
if (ret) {
|
|
pr_err("%s: Clock rate set failed (%d)\n", __func__, ret);
|
|
goto clk_put;
|
|
}
|
|
|
|
ret = clk_prepare(host->pclk);
|
|
if (ret)
|
|
goto clk_put;
|
|
|
|
ret = clk_prepare(host->clk);
|
|
if (ret)
|
|
goto clk_unprepare_p;
|
|
|
|
/* Enable clocks */
|
|
ret = msmsdcc_enable_clocks(host);
|
|
if (ret)
|
|
goto clk_unprepare;
|
|
|
|
host->pclk_rate = clk_get_rate(host->pclk);
|
|
host->clk_rate = clk_get_rate(host->clk);
|
|
|
|
/*
|
|
* Setup MMC host structure
|
|
*/
|
|
mmc->ops = &msmsdcc_ops;
|
|
mmc->f_min = msmsdcc_fmin;
|
|
mmc->f_max = msmsdcc_fmax;
|
|
mmc->ocr_avail = plat->ocr_mask;
|
|
|
|
if (msmsdcc_4bit)
|
|
mmc->caps |= MMC_CAP_4_BIT_DATA;
|
|
if (msmsdcc_sdioirq)
|
|
mmc->caps |= MMC_CAP_SDIO_IRQ;
|
|
mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
|
|
|
|
mmc->max_segs = NR_SG;
|
|
mmc->max_blk_size = 4096; /* MCI_DATA_CTL BLOCKSIZE up to 4096 */
|
|
mmc->max_blk_count = 65536;
|
|
|
|
mmc->max_req_size = 33554432; /* MCI_DATA_LENGTH is 25 bits */
|
|
mmc->max_seg_size = mmc->max_req_size;
|
|
|
|
msmsdcc_writel(host, 0, MMCIMASK0);
|
|
msmsdcc_writel(host, 0x5e007ff, MMCICLEAR);
|
|
|
|
msmsdcc_writel(host, MCI_IRQENABLE, MMCIMASK0);
|
|
host->saved_irq0mask = MCI_IRQENABLE;
|
|
|
|
/*
|
|
* Setup card detect change
|
|
*/
|
|
|
|
memset(&host->timer, 0, sizeof(host->timer));
|
|
|
|
if (stat_irqres && !(stat_irqres->flags & IORESOURCE_DISABLED)) {
|
|
unsigned long irqflags = IRQF_SHARED |
|
|
(stat_irqres->flags & IRQF_TRIGGER_MASK);
|
|
|
|
host->stat_irq = stat_irqres->start;
|
|
ret = request_irq(host->stat_irq,
|
|
msmsdcc_platform_status_irq,
|
|
irqflags,
|
|
DRIVER_NAME " (slot)",
|
|
host);
|
|
if (ret) {
|
|
pr_err("%s: Unable to get slot IRQ %d (%d)\n",
|
|
mmc_hostname(mmc), host->stat_irq, ret);
|
|
goto clk_disable;
|
|
}
|
|
} else if (plat->register_status_notify) {
|
|
plat->register_status_notify(msmsdcc_status_notify_cb, host);
|
|
} else if (!plat->status)
|
|
pr_err("%s: No card detect facilities available\n",
|
|
mmc_hostname(mmc));
|
|
else {
|
|
init_timer(&host->timer);
|
|
host->timer.data = (unsigned long)host;
|
|
host->timer.function = msmsdcc_check_status;
|
|
host->timer.expires = jiffies + HZ;
|
|
add_timer(&host->timer);
|
|
}
|
|
|
|
if (plat->status) {
|
|
host->oldstat = host->plat->status(mmc_dev(host->mmc));
|
|
host->eject = !host->oldstat;
|
|
}
|
|
|
|
ret = request_irq(cmd_irqres->start, msmsdcc_irq, IRQF_SHARED,
|
|
DRIVER_NAME " (cmd)", host);
|
|
if (ret)
|
|
goto stat_irq_free;
|
|
|
|
ret = request_irq(cmd_irqres->start, msmsdcc_pio_irq, IRQF_SHARED,
|
|
DRIVER_NAME " (pio)", host);
|
|
if (ret)
|
|
goto cmd_irq_free;
|
|
|
|
mmc_set_drvdata(pdev, mmc);
|
|
mmc_add_host(mmc);
|
|
|
|
pr_info("%s: Qualcomm MSM SDCC at 0x%016llx irq %d,%d dma %d\n",
|
|
mmc_hostname(mmc), (unsigned long long)memres->start,
|
|
(unsigned int) cmd_irqres->start,
|
|
(unsigned int) host->stat_irq, host->dma.channel);
|
|
pr_info("%s: 4 bit data mode %s\n", mmc_hostname(mmc),
|
|
(mmc->caps & MMC_CAP_4_BIT_DATA ? "enabled" : "disabled"));
|
|
pr_info("%s: MMC clock %u -> %u Hz, PCLK %u Hz\n",
|
|
mmc_hostname(mmc), msmsdcc_fmin, msmsdcc_fmax, host->pclk_rate);
|
|
pr_info("%s: Slot eject status = %d\n", mmc_hostname(mmc), host->eject);
|
|
pr_info("%s: Power save feature enable = %d\n",
|
|
mmc_hostname(mmc), msmsdcc_pwrsave);
|
|
|
|
if (host->dma.channel != -1) {
|
|
pr_info("%s: DM non-cached buffer at %p, dma_addr 0x%.8x\n",
|
|
mmc_hostname(mmc), host->dma.nc, host->dma.nc_busaddr);
|
|
pr_info("%s: DM cmd busaddr 0x%.8x, cmdptr busaddr 0x%.8x\n",
|
|
mmc_hostname(mmc), host->dma.cmd_busaddr,
|
|
host->dma.cmdptr_busaddr);
|
|
} else
|
|
pr_info("%s: PIO transfer enabled\n", mmc_hostname(mmc));
|
|
if (host->timer.function)
|
|
pr_info("%s: Polling status mode enabled\n", mmc_hostname(mmc));
|
|
|
|
return 0;
|
|
cmd_irq_free:
|
|
free_irq(cmd_irqres->start, host);
|
|
stat_irq_free:
|
|
if (host->stat_irq)
|
|
free_irq(host->stat_irq, host);
|
|
clk_disable:
|
|
msmsdcc_disable_clocks(host, 0);
|
|
clk_unprepare:
|
|
clk_unprepare(host->clk);
|
|
clk_unprepare_p:
|
|
clk_unprepare(host->pclk);
|
|
clk_put:
|
|
clk_put(host->clk);
|
|
pclk_put:
|
|
clk_put(host->pclk);
|
|
dma_free:
|
|
if (host->dmares)
|
|
dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata),
|
|
host->dma.nc, host->dma.nc_busaddr);
|
|
ioremap_free:
|
|
tasklet_kill(&host->dma_tlet);
|
|
iounmap(host->base);
|
|
host_free:
|
|
mmc_free_host(mmc);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int
|
|
msmsdcc_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
struct mmc_host *mmc = mmc_get_drvdata(dev);
|
|
|
|
if (mmc) {
|
|
struct msmsdcc_host *host = mmc_priv(mmc);
|
|
|
|
if (host->stat_irq)
|
|
disable_irq(host->stat_irq);
|
|
|
|
msmsdcc_writel(host, 0, MMCIMASK0);
|
|
if (host->clks_on)
|
|
msmsdcc_disable_clocks(host, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
msmsdcc_resume(struct platform_device *dev)
|
|
{
|
|
struct mmc_host *mmc = mmc_get_drvdata(dev);
|
|
|
|
if (mmc) {
|
|
struct msmsdcc_host *host = mmc_priv(mmc);
|
|
|
|
msmsdcc_enable_clocks(host);
|
|
|
|
msmsdcc_writel(host, host->saved_irq0mask, MMCIMASK0);
|
|
|
|
if (host->stat_irq)
|
|
enable_irq(host->stat_irq);
|
|
#if BUSCLK_PWRSAVE
|
|
msmsdcc_disable_clocks(host, 1);
|
|
#endif
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
#define msmsdcc_suspend 0
|
|
#define msmsdcc_resume 0
|
|
#endif
|
|
|
|
static struct platform_driver msmsdcc_driver = {
|
|
.probe = msmsdcc_probe,
|
|
.suspend = msmsdcc_suspend,
|
|
.resume = msmsdcc_resume,
|
|
.driver = {
|
|
.name = "msm_sdcc",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(msmsdcc_driver);
|
|
|
|
MODULE_DESCRIPTION("Qualcomm MSM 7X00A Multimedia Card Interface driver");
|
|
MODULE_LICENSE("GPL");
|