1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * OpenFirmware bindings for the MMC-over-SPI driver
 4 *
 5 * Copyright (c) MontaVista Software, Inc. 2008.
 6 *
 7 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
 8 */
 9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/slab.h>
14#include <linux/irq.h>
15#include <linux/of.h>
16#include <linux/of_irq.h>
17#include <linux/spi/spi.h>
18#include <linux/spi/mmc_spi.h>
19#include <linux/mmc/core.h>
20#include <linux/mmc/host.h>
21
 
 
 
 
 
22MODULE_LICENSE("GPL");
23
24struct of_mmc_spi {
25	struct mmc_spi_platform_data pdata;
26	int detect_irq;
 
27};
28
29static struct of_mmc_spi *to_of_mmc_spi(struct device *dev)
30{
31	return container_of(dev->platform_data, struct of_mmc_spi, pdata);
32}
33
34static int of_mmc_spi_init(struct device *dev,
35			   irqreturn_t (*irqhandler)(int, void *), void *mmc)
36{
37	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
38
39	return request_threaded_irq(oms->detect_irq, NULL, irqhandler,
40					IRQF_ONESHOT, dev_name(dev), mmc);
41}
42
43static void of_mmc_spi_exit(struct device *dev, void *mmc)
44{
45	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
46
47	free_irq(oms->detect_irq, mmc);
48}
49
50struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi)
51{
52	struct mmc_host *mmc = dev_get_drvdata(&spi->dev);
53	struct device *dev = &spi->dev;
 
54	struct of_mmc_spi *oms;
55
56	if (dev->platform_data || !dev_fwnode(dev))
57		return dev->platform_data;
58
59	oms = kzalloc(sizeof(*oms), GFP_KERNEL);
60	if (!oms)
61		return NULL;
62
63	if (mmc_of_parse_voltage(mmc, &oms->pdata.ocr_mask) < 0)
64		goto err_ocr;
65
66	oms->detect_irq = spi->irq;
67	if (oms->detect_irq > 0) {
68		oms->pdata.init = of_mmc_spi_init;
69		oms->pdata.exit = of_mmc_spi_exit;
70	} else {
71		oms->pdata.caps |= MMC_CAP_NEEDS_POLL;
72	}
73	if (device_property_read_bool(dev, "cap-sd-highspeed"))
74		oms->pdata.caps |= MMC_CAP_SD_HIGHSPEED;
75	if (device_property_read_bool(dev, "cap-mmc-highspeed"))
76		oms->pdata.caps |= MMC_CAP_MMC_HIGHSPEED;
77
78	dev->platform_data = &oms->pdata;
79	return dev->platform_data;
80err_ocr:
81	kfree(oms);
82	return NULL;
83}
84EXPORT_SYMBOL(mmc_spi_get_pdata);
85
86void mmc_spi_put_pdata(struct spi_device *spi)
87{
88	struct device *dev = &spi->dev;
 
89	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
90
91	if (!dev->platform_data || !dev_fwnode(dev))
92		return;
93
94	kfree(oms);
95	dev->platform_data = NULL;
96}
97EXPORT_SYMBOL(mmc_spi_put_pdata);

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * OpenFirmware bindings for the MMC-over-SPI driver
 4 *
 5 * Copyright (c) MontaVista Software, Inc. 2008.
 6 *
 7 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
 8 */
 9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/slab.h>
14#include <linux/irq.h>
15#include <linux/of.h>
16#include <linux/of_irq.h>
17#include <linux/spi/spi.h>
18#include <linux/spi/mmc_spi.h>
19#include <linux/mmc/core.h>
20#include <linux/mmc/host.h>
21
22/* For archs that don't support NO_IRQ (such as mips), provide a dummy value */
23#ifndef NO_IRQ
24#define NO_IRQ 0
25#endif
26
27MODULE_LICENSE("GPL");
28
29struct of_mmc_spi {
 
30	int detect_irq;
31	struct mmc_spi_platform_data pdata;
32};
33
34static struct of_mmc_spi *to_of_mmc_spi(struct device *dev)
35{
36	return container_of(dev->platform_data, struct of_mmc_spi, pdata);
37}
38
39static int of_mmc_spi_init(struct device *dev,
40			   irqreturn_t (*irqhandler)(int, void *), void *mmc)
41{
42	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
43
44	return request_threaded_irq(oms->detect_irq, NULL, irqhandler,
45					IRQF_ONESHOT, dev_name(dev), mmc);
46}
47
48static void of_mmc_spi_exit(struct device *dev, void *mmc)
49{
50	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
51
52	free_irq(oms->detect_irq, mmc);
53}
54
55struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi)
56{
 
57	struct device *dev = &spi->dev;
58	struct device_node *np = dev->of_node;
59	struct of_mmc_spi *oms;
60
61	if (dev->platform_data || !np)
62		return dev->platform_data;
63
64	oms = kzalloc(sizeof(*oms), GFP_KERNEL);
65	if (!oms)
66		return NULL;
67
68	if (mmc_of_parse_voltage(np, &oms->pdata.ocr_mask) <= 0)
69		goto err_ocr;
70
71	oms->detect_irq = irq_of_parse_and_map(np, 0);
72	if (oms->detect_irq != 0) {
73		oms->pdata.init = of_mmc_spi_init;
74		oms->pdata.exit = of_mmc_spi_exit;
75	} else {
76		oms->pdata.caps |= MMC_CAP_NEEDS_POLL;
77	}
 
 
 
 
78
79	dev->platform_data = &oms->pdata;
80	return dev->platform_data;
81err_ocr:
82	kfree(oms);
83	return NULL;
84}
85EXPORT_SYMBOL(mmc_spi_get_pdata);
86
87void mmc_spi_put_pdata(struct spi_device *spi)
88{
89	struct device *dev = &spi->dev;
90	struct device_node *np = dev->of_node;
91	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
92
93	if (!dev->platform_data || !np)
94		return;
95
96	kfree(oms);
97	dev->platform_data = NULL;
98}
99EXPORT_SYMBOL(mmc_spi_put_pdata);