mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-09 14:56:40 +07:00
de122cb174
tmio_mmc_host has .enable_dma callback now. We don't need TMIO_MMC_HAVE_CTL_DMA_REG anymore. Let's remove it Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
412 lines
11 KiB
C
412 lines
11 KiB
C
/*
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* SuperH Mobile SDHI
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*
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* Copyright (C) 2009 Magnus Damm
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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 "Compaq ASIC3 support":
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*
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* Copyright 2001 Compaq Computer Corporation.
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* Copyright 2004-2005 Phil Blundell
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* Copyright 2007-2008 OpenedHand Ltd.
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*
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* Authors: Phil Blundell <pb@handhelds.org>,
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* Samuel Ortiz <sameo@openedhand.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/clk.h>
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#include <linux/slab.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/sh_mobile_sdhi.h>
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#include <linux/mfd/tmio.h>
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#include <linux/sh_dma.h>
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#include <linux/delay.h>
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#include "tmio_mmc.h"
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#define EXT_ACC 0xe4
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#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
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struct sh_mobile_sdhi_of_data {
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unsigned long tmio_flags;
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unsigned long capabilities;
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unsigned long capabilities2;
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enum dma_slave_buswidth dma_buswidth;
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dma_addr_t dma_rx_offset;
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};
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static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
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{
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.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
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},
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};
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static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
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.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
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TMIO_MMC_CLK_ACTUAL,
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.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
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};
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static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
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.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
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TMIO_MMC_CLK_ACTUAL,
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.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
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.dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES,
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.dma_rx_offset = 0x2000,
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};
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static const struct of_device_id sh_mobile_sdhi_of_match[] = {
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{ .compatible = "renesas,sdhi-shmobile" },
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{ .compatible = "renesas,sdhi-sh7372" },
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{ .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
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{ .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
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{ .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
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{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
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{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
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{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
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{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
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{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
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{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
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{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
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{},
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};
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MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
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struct sh_mobile_sdhi {
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struct clk *clk;
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struct tmio_mmc_data mmc_data;
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struct tmio_mmc_dma dma_priv;
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};
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static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
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{
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u32 val;
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/*
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* see also
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* sh_mobile_sdhi_of_data :: dma_buswidth
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*/
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switch (sd_ctrl_read16(host, CTL_VERSION)) {
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case 0x490C:
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val = (width == 32) ? 0x0001 : 0x0000;
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break;
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case 0xCB0D:
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val = (width == 32) ? 0x0000 : 0x0001;
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break;
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default:
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/* nothing to do */
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return;
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}
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sd_ctrl_write16(host, EXT_ACC, val);
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}
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static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
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{
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struct mmc_host *mmc = platform_get_drvdata(pdev);
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struct tmio_mmc_host *host = mmc_priv(mmc);
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struct sh_mobile_sdhi *priv = host_to_priv(host);
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int ret = clk_prepare_enable(priv->clk);
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if (ret < 0)
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return ret;
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*f = clk_get_rate(priv->clk);
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/* enable 16bit data access on SDBUF as default */
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sh_mobile_sdhi_sdbuf_width(host, 16);
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return 0;
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}
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static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
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{
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struct mmc_host *mmc = platform_get_drvdata(pdev);
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struct tmio_mmc_host *host = mmc_priv(mmc);
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struct sh_mobile_sdhi *priv = host_to_priv(host);
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clk_disable_unprepare(priv->clk);
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}
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static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
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{
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int timeout = 1000;
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while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
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udelay(1);
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if (!timeout) {
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dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
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return -EBUSY;
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}
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return 0;
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}
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static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
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{
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switch (addr)
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{
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case CTL_SD_CMD:
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case CTL_STOP_INTERNAL_ACTION:
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case CTL_XFER_BLK_COUNT:
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case CTL_SD_CARD_CLK_CTL:
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case CTL_SD_XFER_LEN:
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case CTL_SD_MEM_CARD_OPT:
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case CTL_TRANSACTION_CTL:
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case CTL_DMA_ENABLE:
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return sh_mobile_sdhi_wait_idle(host);
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}
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return 0;
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}
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static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card,
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unsigned int direction, int blk_size)
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{
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/*
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* In Renesas controllers, when performing a
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* multiple block read of one or two blocks,
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* depending on the timing with which the
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* response register is read, the response
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* value may not be read properly.
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* Use single block read for this HW bug
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*/
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if ((direction == MMC_DATA_READ) &&
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blk_size == 2)
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return 1;
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return blk_size;
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}
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static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
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{
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sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);
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/* enable 32bit access if DMA mode if possibile */
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sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16);
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}
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static int sh_mobile_sdhi_probe(struct platform_device *pdev)
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{
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const struct of_device_id *of_id =
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of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
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struct sh_mobile_sdhi *priv;
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struct tmio_mmc_data *mmc_data;
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struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
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struct tmio_mmc_host *host;
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struct resource *res;
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int irq, ret, i = 0;
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bool multiplexed_isr = true;
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struct tmio_mmc_dma *dma_priv;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EINVAL;
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priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
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if (priv == NULL) {
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dev_err(&pdev->dev, "kzalloc failed\n");
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return -ENOMEM;
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}
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mmc_data = &priv->mmc_data;
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dma_priv = &priv->dma_priv;
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priv->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(priv->clk)) {
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ret = PTR_ERR(priv->clk);
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dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
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goto eprobe;
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}
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host = tmio_mmc_host_alloc(pdev);
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if (!host) {
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ret = -ENOMEM;
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goto eprobe;
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}
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host->dma = dma_priv;
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host->write16_hook = sh_mobile_sdhi_write16_hook;
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host->clk_enable = sh_mobile_sdhi_clk_enable;
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host->clk_disable = sh_mobile_sdhi_clk_disable;
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host->multi_io_quirk = sh_mobile_sdhi_multi_io_quirk;
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/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
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if (resource_size(res) > 0x100)
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host->bus_shift = 1;
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else
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host->bus_shift = 0;
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mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
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if (p) {
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mmc_data->flags = p->tmio_flags;
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mmc_data->ocr_mask = p->tmio_ocr_mask;
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mmc_data->capabilities |= p->tmio_caps;
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mmc_data->capabilities2 |= p->tmio_caps2;
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mmc_data->cd_gpio = p->cd_gpio;
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if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
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/*
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* Yes, we have to provide slave IDs twice to TMIO:
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* once as a filter parameter and once for channel
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* configuration as an explicit slave ID
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*/
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dma_priv->chan_priv_tx = (void *)p->dma_slave_tx;
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dma_priv->chan_priv_rx = (void *)p->dma_slave_rx;
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dma_priv->slave_id_tx = p->dma_slave_tx;
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dma_priv->slave_id_rx = p->dma_slave_rx;
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}
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}
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dma_priv->filter = shdma_chan_filter;
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dma_priv->enable = sh_mobile_sdhi_enable_dma;
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mmc_data->alignment_shift = 1; /* 2-byte alignment */
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/*
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* All SDHI blocks support 2-byte and larger block sizes in 4-bit
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* bus width mode.
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*/
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mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
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/*
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* All SDHI blocks support SDIO IRQ signalling.
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*/
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mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
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/*
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* All SDHI have CMD12 controll bit
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*/
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mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
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/*
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* All SDHI need SDIO_INFO1 reserved bit
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*/
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mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK;
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if (of_id && of_id->data) {
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const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
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mmc_data->flags |= of_data->tmio_flags;
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mmc_data->capabilities |= of_data->capabilities;
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mmc_data->capabilities2 |= of_data->capabilities2;
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mmc_data->dma_rx_offset = of_data->dma_rx_offset;
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dma_priv->dma_buswidth = of_data->dma_buswidth;
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}
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ret = tmio_mmc_host_probe(host, mmc_data);
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if (ret < 0)
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goto efree;
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/*
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* Allow one or more specific (named) ISRs or
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* one or more multiplexed (un-named) ISRs.
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*/
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irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
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if (irq >= 0) {
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multiplexed_isr = false;
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ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
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dev_name(&pdev->dev), host);
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if (ret)
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goto eirq;
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}
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irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
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if (irq >= 0) {
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multiplexed_isr = false;
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ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
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dev_name(&pdev->dev), host);
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if (ret)
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goto eirq;
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}
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irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
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if (irq >= 0) {
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multiplexed_isr = false;
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ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
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dev_name(&pdev->dev), host);
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if (ret)
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goto eirq;
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} else if (!multiplexed_isr) {
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dev_err(&pdev->dev,
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"Principal SD-card IRQ is missing among named interrupts\n");
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ret = irq;
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goto eirq;
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}
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if (multiplexed_isr) {
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while (1) {
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irq = platform_get_irq(pdev, i);
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if (irq < 0)
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break;
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i++;
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ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
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dev_name(&pdev->dev), host);
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if (ret)
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goto eirq;
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}
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/* There must be at least one IRQ source */
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if (!i) {
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ret = irq;
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goto eirq;
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}
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}
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dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
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mmc_hostname(host->mmc), (unsigned long)
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(platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
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host->mmc->f_max / 1000000);
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return ret;
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eirq:
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tmio_mmc_host_remove(host);
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efree:
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tmio_mmc_host_free(host);
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eprobe:
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return ret;
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}
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static int sh_mobile_sdhi_remove(struct platform_device *pdev)
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{
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struct mmc_host *mmc = platform_get_drvdata(pdev);
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struct tmio_mmc_host *host = mmc_priv(mmc);
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tmio_mmc_host_remove(host);
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return 0;
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}
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static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
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pm_runtime_force_resume)
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SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
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tmio_mmc_host_runtime_resume,
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NULL)
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};
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static struct platform_driver sh_mobile_sdhi_driver = {
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.driver = {
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.name = "sh_mobile_sdhi",
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.pm = &tmio_mmc_dev_pm_ops,
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.of_match_table = sh_mobile_sdhi_of_match,
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},
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.probe = sh_mobile_sdhi_probe,
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.remove = sh_mobile_sdhi_remove,
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};
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module_platform_driver(sh_mobile_sdhi_driver);
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MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
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MODULE_AUTHOR("Magnus Damm");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:sh_mobile_sdhi");
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