diff options
Diffstat (limited to 'drivers/mmc/host/tmio_mmc.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c deleted file mode 100644 index 53a2ad9a24b8..000000000000 --- a/drivers/mmc/host/tmio_mmc.c +++ /dev/null @@ -1,227 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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 - */ - -#include <linux/delay.h> -#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" - -/* Registers specific to this variant */ -#define CTL_SDIO_REGS 0x100 -#define CTL_CLK_AND_WAIT_CTL 0x138 -#define CTL_RESET_SDIO 0x1e0 - -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)); - - usleep_range(10000, 11000); - 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) -{ - 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)); - - usleep_range(10000, 11000); -} - -static void tmio_mmc_set_clock(struct tmio_mmc_host *host, - unsigned int new_clock) -{ - unsigned int divisor; - u32 clk = 0; - int clk_sel; - - if (new_clock == 0) { - tmio_mmc_clk_stop(host); - return; - } - - divisor = host->pdata->hclk / new_clock; - - /* bit7 set: 1/512, ... bit0 set: 1/4, all bits clear: 1/2 */ - clk_sel = (divisor <= 1); - clk = clk_sel ? 0 : (roundup_pow_of_two(divisor) >> 2); - - host->pdata->set_clk_div(host->pdev, clk_sel); - - 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); - usleep_range(10000, 11000); - - tmio_mmc_clk_start(host); -} - -static void tmio_mmc_reset(struct tmio_mmc_host *host, bool preserve) -{ - sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); - usleep_range(10000, 11000); - sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); - usleep_range(10000, 11000); -} - -#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; - } - - 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->set_clock = tmio_mmc_set_clock; - host->reset = tmio_mmc_reset; - - 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%p irq %d\n", mmc_hostname(host->mmc), 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", - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - .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 <[email protected]>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:tmio-mmc"); |