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// SPDX-License-Identifier: GPL-2.0-only
/*
* Toshiba TC6387XB support
* Copyright (c) 2005 Ian Molton
*
* This file contains TC6387XB base support.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
#include <linux/mfd/tc6387xb.h>
#include <linux/slab.h>
enum {
TC6387XB_CELL_MMC,
};
struct tc6387xb {
void __iomem *scr;
struct clk *clk32k;
struct resource rscr;
};
static const struct resource tc6387xb_mmc_resources[] = {
{
.start = 0x800,
.end = 0x9ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0,
.end = 0,
.flags = IORESOURCE_IRQ,
},
};
/*--------------------------------------------------------------------------*/
static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
{
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
if (pdata && pdata->suspend)
pdata->suspend(dev);
clk_disable_unprepare(tc6387xb->clk32k);
return 0;
}
static int tc6387xb_resume(struct platform_device *dev)
{
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
clk_prepare_enable(tc6387xb->clk32k);
if (pdata && pdata->resume)
pdata->resume(dev);
tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0,
tc6387xb_mmc_resources[0].start & 0xfffe);
return 0;
}
/*--------------------------------------------------------------------------*/
static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state)
{
struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state);
}
static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state)
{
struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state);
}
static int tc6387xb_mmc_enable(struct platform_device *mmc)
{
struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
clk_prepare_enable(tc6387xb->clk32k);
tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0,
tc6387xb_mmc_resources[0].start & 0xfffe);
return 0;
}
static int tc6387xb_mmc_disable(struct platform_device *mmc)
{
struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
clk_disable_unprepare(tc6387xb->clk32k);
return 0;
}
static struct tmio_mmc_data tc6387xb_mmc_data = {
.hclk = 24000000,
.set_pwr = tc6387xb_mmc_pwr,
.set_clk_div = tc6387xb_mmc_clk_div,
};
/*--------------------------------------------------------------------------*/
static const struct mfd_cell tc6387xb_cells[] = {
[TC6387XB_CELL_MMC] = {
.name = "tmio-mmc",
.enable = tc6387xb_mmc_enable,
.disable = tc6387xb_mmc_disable,
.platform_data = &tc6387xb_mmc_data,
.pdata_size = sizeof(tc6387xb_mmc_data),
.num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
.resources = tc6387xb_mmc_resources,
},
};
static int tc6387xb_probe(struct platform_device *dev)
{
struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
struct resource *iomem, *rscr;
struct clk *clk32k;
struct tc6387xb *tc6387xb;
int irq, ret;
iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!iomem)
return -EINVAL;
tc6387xb = kzalloc(sizeof(*tc6387xb), GFP_KERNEL);
if (!tc6387xb)
return -ENOMEM;
ret = platform_get_irq(dev, 0);
if (ret >= 0)
irq = ret;
else
goto err_no_irq;
clk32k = clk_get(&dev->dev, "CLK_CK32K");
if (IS_ERR(clk32k)) {
ret = PTR_ERR(clk32k);
goto err_no_clk;
}
rscr = &tc6387xb->rscr;
rscr->name = "tc6387xb-core";
rscr->start = iomem->start;
rscr->end = iomem->start + 0xff;
rscr->flags = IORESOURCE_MEM;
ret = request_resource(iomem, rscr);
if (ret)
goto err_resource;
tc6387xb->scr = ioremap(rscr->start, resource_size(rscr));
if (!tc6387xb->scr) {
ret = -ENOMEM;
goto err_ioremap;
}
tc6387xb->clk32k = clk32k;
platform_set_drvdata(dev, tc6387xb);
if (pdata && pdata->enable)
pdata->enable(dev);
dev_info(&dev->dev, "Toshiba tc6387xb initialised\n");
ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL);
if (!ret)
return 0;
iounmap(tc6387xb->scr);
err_ioremap:
release_resource(&tc6387xb->rscr);
err_resource:
clk_put(clk32k);
err_no_clk:
err_no_irq:
kfree(tc6387xb);
return ret;
}
static int tc6387xb_remove(struct platform_device *dev)
{
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
mfd_remove_devices(&dev->dev);
iounmap(tc6387xb->scr);
release_resource(&tc6387xb->rscr);
clk_disable_unprepare(tc6387xb->clk32k);
clk_put(tc6387xb->clk32k);
kfree(tc6387xb);
return 0;
}
static struct platform_driver tc6387xb_platform_driver = {
.driver = {
.name = "tc6387xb",
},
.probe = tc6387xb_probe,
.remove = tc6387xb_remove,
.suspend = pm_sleep_ptr(tc6387xb_suspend),
.resume = pm_sleep_ptr(tc6387xb_resume),
};
module_platform_driver(tc6387xb_platform_driver);
MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ian Molton");
MODULE_ALIAS("platform:tc6387xb");
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