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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
4 *
5 * Author: Saeed Bishara <saeed@marvell.com>
6 * Mike Rapoport <mike@compulab.co.il>
7 * Based on sdhci-cns3xxx.c
8 */
9
10#include <linux/clk.h>
11#include <linux/err.h>
12#include <linux/io.h>
13#include <linux/mmc/host.h>
14#include <linux/module.h>
15#include <linux/of.h>
16
17#include "sdhci-pltfm.h"
18
19static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
20{
21 u16 ret;
22
23 switch (reg) {
24 case SDHCI_HOST_VERSION:
25 case SDHCI_SLOT_INT_STATUS:
26 /* those registers don't exist */
27 return 0;
28 default:
29 ret = readw(host->ioaddr + reg);
30 }
31 return ret;
32}
33
34static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
35{
36 u32 ret;
37
38 ret = readl(host->ioaddr + reg);
39
40 switch (reg) {
41 case SDHCI_CAPABILITIES:
42 /* Mask the support for 3.0V */
43 ret &= ~SDHCI_CAN_VDD_300;
44 break;
45 }
46 return ret;
47}
48
49static const struct sdhci_ops sdhci_dove_ops = {
50 .read_w = sdhci_dove_readw,
51 .read_l = sdhci_dove_readl,
52 .set_clock = sdhci_set_clock,
53 .set_bus_width = sdhci_set_bus_width,
54 .reset = sdhci_reset,
55 .set_uhs_signaling = sdhci_set_uhs_signaling,
56};
57
58static const struct sdhci_pltfm_data sdhci_dove_pdata = {
59 .ops = &sdhci_dove_ops,
60 .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
61 SDHCI_QUIRK_NO_BUSY_IRQ |
62 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
63 SDHCI_QUIRK_FORCE_DMA |
64 SDHCI_QUIRK_NO_HISPD_BIT,
65};
66
67static int sdhci_dove_probe(struct platform_device *pdev)
68{
69 struct sdhci_host *host;
70 struct sdhci_pltfm_host *pltfm_host;
71 int ret;
72
73 host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
74 if (IS_ERR(host))
75 return PTR_ERR(host);
76
77 pltfm_host = sdhci_priv(host);
78 pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
79
80 if (!IS_ERR(pltfm_host->clk))
81 clk_prepare_enable(pltfm_host->clk);
82
83 ret = mmc_of_parse(host->mmc);
84 if (ret)
85 goto err_sdhci_add;
86
87 ret = sdhci_add_host(host);
88 if (ret)
89 goto err_sdhci_add;
90
91 return 0;
92
93err_sdhci_add:
94 clk_disable_unprepare(pltfm_host->clk);
95 sdhci_pltfm_free(pdev);
96 return ret;
97}
98
99static const struct of_device_id sdhci_dove_of_match_table[] = {
100 { .compatible = "marvell,dove-sdhci", },
101 {}
102};
103MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
104
105static struct platform_driver sdhci_dove_driver = {
106 .driver = {
107 .name = "sdhci-dove",
108 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
109 .pm = &sdhci_pltfm_pmops,
110 .of_match_table = sdhci_dove_of_match_table,
111 },
112 .probe = sdhci_dove_probe,
113 .remove = sdhci_pltfm_unregister,
114};
115
116module_platform_driver(sdhci_dove_driver);
117
118MODULE_DESCRIPTION("SDHCI driver for Dove");
119MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
120 "Mike Rapoport <mike@compulab.co.il>");
121MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
4 *
5 * Author: Saeed Bishara <saeed@marvell.com>
6 * Mike Rapoport <mike@compulab.co.il>
7 * Based on sdhci-cns3xxx.c
8 */
9
10#include <linux/clk.h>
11#include <linux/err.h>
12#include <linux/io.h>
13#include <linux/mmc/host.h>
14#include <linux/module.h>
15#include <linux/of.h>
16
17#include "sdhci-pltfm.h"
18
19static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
20{
21 u16 ret;
22
23 switch (reg) {
24 case SDHCI_HOST_VERSION:
25 case SDHCI_SLOT_INT_STATUS:
26 /* those registers don't exist */
27 return 0;
28 default:
29 ret = readw(host->ioaddr + reg);
30 }
31 return ret;
32}
33
34static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
35{
36 u32 ret;
37
38 ret = readl(host->ioaddr + reg);
39
40 switch (reg) {
41 case SDHCI_CAPABILITIES:
42 /* Mask the support for 3.0V */
43 ret &= ~SDHCI_CAN_VDD_300;
44 break;
45 }
46 return ret;
47}
48
49static const struct sdhci_ops sdhci_dove_ops = {
50 .read_w = sdhci_dove_readw,
51 .read_l = sdhci_dove_readl,
52 .set_clock = sdhci_set_clock,
53 .set_bus_width = sdhci_set_bus_width,
54 .reset = sdhci_reset,
55 .set_uhs_signaling = sdhci_set_uhs_signaling,
56};
57
58static const struct sdhci_pltfm_data sdhci_dove_pdata = {
59 .ops = &sdhci_dove_ops,
60 .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
61 SDHCI_QUIRK_NO_BUSY_IRQ |
62 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
63 SDHCI_QUIRK_FORCE_DMA |
64 SDHCI_QUIRK_NO_HISPD_BIT,
65};
66
67static int sdhci_dove_probe(struct platform_device *pdev)
68{
69 struct sdhci_host *host;
70 struct sdhci_pltfm_host *pltfm_host;
71 int ret;
72
73 host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
74 if (IS_ERR(host))
75 return PTR_ERR(host);
76
77 pltfm_host = sdhci_priv(host);
78 pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
79
80 if (!IS_ERR(pltfm_host->clk))
81 clk_prepare_enable(pltfm_host->clk);
82
83 ret = mmc_of_parse(host->mmc);
84 if (ret)
85 goto err_sdhci_add;
86
87 ret = sdhci_add_host(host);
88 if (ret)
89 goto err_sdhci_add;
90
91 return 0;
92
93err_sdhci_add:
94 clk_disable_unprepare(pltfm_host->clk);
95 sdhci_pltfm_free(pdev);
96 return ret;
97}
98
99static const struct of_device_id sdhci_dove_of_match_table[] = {
100 { .compatible = "marvell,dove-sdhci", },
101 {}
102};
103MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
104
105static struct platform_driver sdhci_dove_driver = {
106 .driver = {
107 .name = "sdhci-dove",
108 .pm = &sdhci_pltfm_pmops,
109 .of_match_table = sdhci_dove_of_match_table,
110 },
111 .probe = sdhci_dove_probe,
112 .remove = sdhci_pltfm_unregister,
113};
114
115module_platform_driver(sdhci_dove_driver);
116
117MODULE_DESCRIPTION("SDHCI driver for Dove");
118MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
119 "Mike Rapoport <mike@compulab.co.il>");
120MODULE_LICENSE("GPL v2");