diff options
author | Wolfram Sang <w.sang@pengutronix.de> | 2010-10-15 06:21:04 -0400 |
---|---|---|
committer | Chris Ball <cjb@laptop.org> | 2010-10-23 09:11:22 -0400 |
commit | 95f25efe0ce22e28d61722d655d2ef582f5f7520 (patch) | |
tree | 90ce49eee31ae50ca91b812d7d9dda4d35136043 /drivers/mmc | |
parent | 80872e21b0263f016f2edb7b72dd8be5636d7ca7 (diff) |
mmc: sdhci-pltfm: add -pltfm driver for imx35/51
This driver adds basic support for the esdhc-core found on e.g.
imx35/51, as a platform driver.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Tested-by: Eric BĂ©nard <eric@eukrea.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r-- | drivers/mmc/host/Kconfig | 10 | ||||
-rw-r--r-- | drivers/mmc/host/Makefile | 1 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 143 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-pltfm.c | 3 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-pltfm.h | 1 |
5 files changed, 158 insertions, 0 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 0b7024a4ffc2..c9c2520a0c4a 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig | |||
@@ -130,6 +130,16 @@ config MMC_SDHCI_CNS3XXX | |||
130 | 130 | ||
131 | If unsure, say N. | 131 | If unsure, say N. |
132 | 132 | ||
133 | config MMC_SDHCI_ESDHC_IMX | ||
134 | bool "SDHCI platform support for the Freescale eSDHC i.MX controller" | ||
135 | depends on MMC_SDHCI_PLTFM && (ARCH_MX25 || ARCH_MX35 || ARCH_MX5) | ||
136 | select MMC_SDHCI_IO_ACCESSORS | ||
137 | help | ||
138 | This selects the Freescale eSDHC controller support on the platform | ||
139 | bus, found on platforms like mx35/51. | ||
140 | |||
141 | If unsure, say N. | ||
142 | |||
133 | config MMC_SDHCI_S3C | 143 | config MMC_SDHCI_S3C |
134 | tristate "SDHCI support on Samsung S3C SoC" | 144 | tristate "SDHCI support on Samsung S3C SoC" |
135 | depends on MMC_SDHCI && PLAT_SAMSUNG | 145 | depends on MMC_SDHCI && PLAT_SAMSUNG |
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index eae5d62711f7..6c4ac67f739f 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile | |||
@@ -37,6 +37,7 @@ obj-$(CONFIG_MMC_USHC) += ushc.o | |||
37 | obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-platform.o | 37 | obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-platform.o |
38 | sdhci-platform-y := sdhci-pltfm.o | 38 | sdhci-platform-y := sdhci-pltfm.o |
39 | sdhci-platform-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o | 39 | sdhci-platform-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o |
40 | sdhci-platform-$(CONFIG_MMC_SDHCI_ESDHC_IMX) += sdhci-esdhc-imx.o | ||
40 | 41 | ||
41 | obj-$(CONFIG_MMC_SDHCI_OF) += sdhci-of.o | 42 | obj-$(CONFIG_MMC_SDHCI_OF) += sdhci-of.o |
42 | sdhci-of-y := sdhci-of-core.o | 43 | sdhci-of-y := sdhci-of-core.o |
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c new file mode 100644 index 000000000000..2e9cca19c90b --- /dev/null +++ b/drivers/mmc/host/sdhci-esdhc-imx.c | |||
@@ -0,0 +1,143 @@ | |||
1 | /* | ||
2 | * Freescale eSDHC i.MX controller driver for the platform bus. | ||
3 | * | ||
4 | * derived from the OF-version. | ||
5 | * | ||
6 | * Copyright (c) 2010 Pengutronix e.K. | ||
7 | * Author: Wolfram Sang <w.sang@pengutronix.de> | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License as published by | ||
11 | * the Free Software Foundation; either version 2 of the License. | ||
12 | */ | ||
13 | |||
14 | #include <linux/io.h> | ||
15 | #include <linux/delay.h> | ||
16 | #include <linux/err.h> | ||
17 | #include <linux/clk.h> | ||
18 | #include <linux/mmc/host.h> | ||
19 | #include <linux/mmc/sdhci-pltfm.h> | ||
20 | #include "sdhci.h" | ||
21 | #include "sdhci-pltfm.h" | ||
22 | #include "sdhci-esdhc.h" | ||
23 | |||
24 | static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg) | ||
25 | { | ||
26 | void __iomem *base = host->ioaddr + (reg & ~0x3); | ||
27 | u32 shift = (reg & 0x3) * 8; | ||
28 | |||
29 | writel(((readl(base) & ~(mask << shift)) | (val << shift)), base); | ||
30 | } | ||
31 | |||
32 | static u16 esdhc_readw_le(struct sdhci_host *host, int reg) | ||
33 | { | ||
34 | if (unlikely(reg == SDHCI_HOST_VERSION)) | ||
35 | reg ^= 2; | ||
36 | |||
37 | return readw(host->ioaddr + reg); | ||
38 | } | ||
39 | |||
40 | static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg) | ||
41 | { | ||
42 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | ||
43 | |||
44 | switch (reg) { | ||
45 | case SDHCI_TRANSFER_MODE: | ||
46 | /* | ||
47 | * Postpone this write, we must do it together with a | ||
48 | * command write that is down below. | ||
49 | */ | ||
50 | pltfm_host->scratchpad = val; | ||
51 | return; | ||
52 | case SDHCI_COMMAND: | ||
53 | writel(val << 16 | pltfm_host->scratchpad, | ||
54 | host->ioaddr + SDHCI_TRANSFER_MODE); | ||
55 | return; | ||
56 | case SDHCI_BLOCK_SIZE: | ||
57 | val &= ~SDHCI_MAKE_BLKSZ(0x7, 0); | ||
58 | break; | ||
59 | } | ||
60 | esdhc_clrset_le(host, 0xffff, val, reg); | ||
61 | } | ||
62 | |||
63 | static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg) | ||
64 | { | ||
65 | u32 new_val; | ||
66 | |||
67 | switch (reg) { | ||
68 | case SDHCI_POWER_CONTROL: | ||
69 | /* | ||
70 | * FSL put some DMA bits here | ||
71 | * If your board has a regulator, code should be here | ||
72 | */ | ||
73 | return; | ||
74 | case SDHCI_HOST_CONTROL: | ||
75 | /* FSL messed up here, so we can just keep those two */ | ||
76 | new_val = val & (SDHCI_CTRL_LED | SDHCI_CTRL_4BITBUS); | ||
77 | /* ensure the endianess */ | ||
78 | new_val |= ESDHC_HOST_CONTROL_LE; | ||
79 | /* DMA mode bits are shifted */ | ||
80 | new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5; | ||
81 | |||
82 | esdhc_clrset_le(host, 0xffff, new_val, reg); | ||
83 | return; | ||
84 | } | ||
85 | esdhc_clrset_le(host, 0xff, val, reg); | ||
86 | } | ||
87 | |||
88 | static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host) | ||
89 | { | ||
90 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | ||
91 | |||
92 | return clk_get_rate(pltfm_host->clk); | ||
93 | } | ||
94 | |||
95 | static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host) | ||
96 | { | ||
97 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | ||
98 | |||
99 | return clk_get_rate(pltfm_host->clk) / 256 / 16; | ||
100 | } | ||
101 | |||
102 | static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pdata) | ||
103 | { | ||
104 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | ||
105 | struct clk *clk; | ||
106 | |||
107 | clk = clk_get(mmc_dev(host->mmc), NULL); | ||
108 | if (IS_ERR(clk)) { | ||
109 | dev_err(mmc_dev(host->mmc), "clk err\n"); | ||
110 | return PTR_ERR(clk); | ||
111 | } | ||
112 | clk_enable(clk); | ||
113 | pltfm_host->clk = clk; | ||
114 | |||
115 | return 0; | ||
116 | } | ||
117 | |||
118 | static void esdhc_pltfm_exit(struct sdhci_host *host) | ||
119 | { | ||
120 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | ||
121 | |||
122 | clk_disable(pltfm_host->clk); | ||
123 | clk_put(pltfm_host->clk); | ||
124 | } | ||
125 | |||
126 | static struct sdhci_ops sdhci_esdhc_ops = { | ||
127 | .read_w = esdhc_readw_le, | ||
128 | .write_w = esdhc_writew_le, | ||
129 | .write_b = esdhc_writeb_le, | ||
130 | .set_clock = esdhc_set_clock, | ||
131 | .get_max_clock = esdhc_pltfm_get_max_clock, | ||
132 | .get_min_clock = esdhc_pltfm_get_min_clock, | ||
133 | }; | ||
134 | |||
135 | struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = { | ||
136 | .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_MULTIBLOCK | ||
137 | | SDHCI_QUIRK_BROKEN_ADMA, | ||
138 | /* ADMA has issues. Might be fixable */ | ||
139 | /* NO_MULTIBLOCK might be MX35 only (Errata: ENGcm07207) */ | ||
140 | .ops = &sdhci_esdhc_ops, | ||
141 | .init = esdhc_pltfm_init, | ||
142 | .exit = esdhc_pltfm_exit, | ||
143 | }; | ||
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c index 00e8a8ab638e..0502f89f662b 100644 --- a/drivers/mmc/host/sdhci-pltfm.c +++ b/drivers/mmc/host/sdhci-pltfm.c | |||
@@ -167,6 +167,9 @@ static const struct platform_device_id sdhci_pltfm_ids[] = { | |||
167 | #ifdef CONFIG_MMC_SDHCI_CNS3XXX | 167 | #ifdef CONFIG_MMC_SDHCI_CNS3XXX |
168 | { "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata }, | 168 | { "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata }, |
169 | #endif | 169 | #endif |
170 | #ifdef CONFIG_MMC_SDHCI_ESDHC_IMX | ||
171 | { "sdhci-esdhc-imx", (kernel_ulong_t)&sdhci_esdhc_imx_pdata }, | ||
172 | #endif | ||
170 | { }, | 173 | { }, |
171 | }; | 174 | }; |
172 | MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids); | 175 | MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids); |
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h index 562b92957f18..c1bfe48af56a 100644 --- a/drivers/mmc/host/sdhci-pltfm.h +++ b/drivers/mmc/host/sdhci-pltfm.h | |||
@@ -21,5 +21,6 @@ struct sdhci_pltfm_host { | |||
21 | }; | 21 | }; |
22 | 22 | ||
23 | extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata; | 23 | extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata; |
24 | extern struct sdhci_pltfm_data sdhci_esdhc_imx_pdata; | ||
24 | 25 | ||
25 | #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */ | 26 | #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */ |