Commit | Line | Data |
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985b1aa0 MR |
1 | /* |
2 | * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC | |
3 | * | |
4 | * Author: Saeed Bishara <saeed@marvell.com> | |
5 | * Mike Rapoport <mike@compulab.co.il> | |
6 | * Based on sdhci-cns3xxx.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
30b87c60 SH |
22 | #include <linux/clk.h> |
23 | #include <linux/err.h> | |
f8ec589b | 24 | #include <linux/io.h> |
985b1aa0 | 25 | #include <linux/mmc/host.h> |
f8ec589b | 26 | #include <linux/module.h> |
4ee7ed0d | 27 | #include <linux/of.h> |
985b1aa0 | 28 | |
985b1aa0 MR |
29 | #include "sdhci-pltfm.h" |
30 | ||
31 | static u16 sdhci_dove_readw(struct sdhci_host *host, int reg) | |
32 | { | |
33 | u16 ret; | |
34 | ||
35 | switch (reg) { | |
36 | case SDHCI_HOST_VERSION: | |
37 | case SDHCI_SLOT_INT_STATUS: | |
38 | /* those registers don't exist */ | |
39 | return 0; | |
40 | default: | |
41 | ret = readw(host->ioaddr + reg); | |
42 | } | |
43 | return ret; | |
44 | } | |
45 | ||
46 | static u32 sdhci_dove_readl(struct sdhci_host *host, int reg) | |
47 | { | |
48 | u32 ret; | |
49 | ||
f8ec589b RK |
50 | ret = readl(host->ioaddr + reg); |
51 | ||
985b1aa0 MR |
52 | switch (reg) { |
53 | case SDHCI_CAPABILITIES: | |
985b1aa0 MR |
54 | /* Mask the support for 3.0V */ |
55 | ret &= ~SDHCI_CAN_VDD_300; | |
56 | break; | |
985b1aa0 MR |
57 | } |
58 | return ret; | |
59 | } | |
60 | ||
c915568d | 61 | static const struct sdhci_ops sdhci_dove_ops = { |
985b1aa0 MR |
62 | .read_w = sdhci_dove_readw, |
63 | .read_l = sdhci_dove_readl, | |
1771059c | 64 | .set_clock = sdhci_set_clock, |
2317f56c | 65 | .set_bus_width = sdhci_set_bus_width, |
03231f9b | 66 | .reset = sdhci_reset, |
96d7b78c | 67 | .set_uhs_signaling = sdhci_set_uhs_signaling, |
985b1aa0 MR |
68 | }; |
69 | ||
1db5eebf | 70 | static const struct sdhci_pltfm_data sdhci_dove_pdata = { |
985b1aa0 MR |
71 | .ops = &sdhci_dove_ops, |
72 | .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER | | |
73 | SDHCI_QUIRK_NO_BUSY_IRQ | | |
74 | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | | |
a9ca1d54 SH |
75 | SDHCI_QUIRK_FORCE_DMA | |
76 | SDHCI_QUIRK_NO_HISPD_BIT, | |
985b1aa0 | 77 | }; |
85d6509d | 78 | |
c3be1efd | 79 | static int sdhci_dove_probe(struct platform_device *pdev) |
85d6509d | 80 | { |
30b87c60 SH |
81 | struct sdhci_host *host; |
82 | struct sdhci_pltfm_host *pltfm_host; | |
30b87c60 SH |
83 | int ret; |
84 | ||
0e748234 | 85 | host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0); |
c5ee2490 SH |
86 | if (IS_ERR(host)) |
87 | return PTR_ERR(host); | |
ee3298a2 | 88 | |
30b87c60 | 89 | pltfm_host = sdhci_priv(host); |
35daeede | 90 | pltfm_host->clk = devm_clk_get(&pdev->dev, NULL); |
30b87c60 | 91 | |
35daeede KH |
92 | if (!IS_ERR(pltfm_host->clk)) |
93 | clk_prepare_enable(pltfm_host->clk); | |
c430689f | 94 | |
c5ee2490 SH |
95 | ret = mmc_of_parse(host->mmc); |
96 | if (ret) | |
97 | goto err_sdhci_add; | |
c430689f RK |
98 | |
99 | ret = sdhci_add_host(host); | |
100 | if (ret) | |
101 | goto err_sdhci_add; | |
102 | ||
30b87c60 SH |
103 | return 0; |
104 | ||
c430689f | 105 | err_sdhci_add: |
35daeede | 106 | clk_disable_unprepare(pltfm_host->clk); |
c430689f | 107 | sdhci_pltfm_free(pdev); |
30b87c60 | 108 | return ret; |
85d6509d SG |
109 | } |
110 | ||
498d83e7 | 111 | static const struct of_device_id sdhci_dove_of_match_table[] = { |
4ee7ed0d SH |
112 | { .compatible = "marvell,dove-sdhci", }, |
113 | {} | |
114 | }; | |
115 | MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table); | |
116 | ||
85d6509d SG |
117 | static struct platform_driver sdhci_dove_driver = { |
118 | .driver = { | |
119 | .name = "sdhci-dove", | |
29495aa0 | 120 | .pm = SDHCI_PLTFM_PMOPS, |
5941fd07 | 121 | .of_match_table = sdhci_dove_of_match_table, |
85d6509d SG |
122 | }, |
123 | .probe = sdhci_dove_probe, | |
caebcae9 | 124 | .remove = sdhci_pltfm_unregister, |
85d6509d SG |
125 | }; |
126 | ||
d1f81a64 | 127 | module_platform_driver(sdhci_dove_driver); |
85d6509d SG |
128 | |
129 | MODULE_DESCRIPTION("SDHCI driver for Dove"); | |
130 | MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, " | |
131 | "Mike Rapoport <mike@compulab.co.il>"); | |
132 | MODULE_LICENSE("GPL v2"); |