aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/plat-mxc
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/devices/Kconfig4
-rw-r--r--arch/arm/plat-mxc/devices/Makefile1
-rw-r--r--arch/arm/plat-mxc/devices/platform-ahci-imx.c156
-rw-r--r--arch/arm/plat-mxc/include/mach/devices-common.h10
4 files changed, 171 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/devices/Kconfig b/arch/arm/plat-mxc/devices/Kconfig
index bd294add932c..f63887ba88b4 100644
--- a/arch/arm/plat-mxc/devices/Kconfig
+++ b/arch/arm/plat-mxc/devices/Kconfig
@@ -76,3 +76,7 @@ config IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
76 76
77config IMX_HAVE_PLATFORM_SPI_IMX 77config IMX_HAVE_PLATFORM_SPI_IMX
78 bool 78 bool
79
80config IMX_HAVE_PLATFORM_AHCI
81 bool
82 default y if ARCH_MX53
diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
index b41bf972b54b..e858ad92c3ec 100644
--- a/arch/arm/plat-mxc/devices/Makefile
+++ b/arch/arm/plat-mxc/devices/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_RTC) += platform-mxc_rtc.o
25obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_W1) += platform-mxc_w1.o 25obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_W1) += platform-mxc_w1.o
26obj-$(CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX) += platform-sdhci-esdhc-imx.o 26obj-$(CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX) += platform-sdhci-esdhc-imx.o
27obj-$(CONFIG_IMX_HAVE_PLATFORM_SPI_IMX) += platform-spi_imx.o 27obj-$(CONFIG_IMX_HAVE_PLATFORM_SPI_IMX) += platform-spi_imx.o
28obj-$(CONFIG_IMX_HAVE_PLATFORM_AHCI) += platform-ahci-imx.o
diff --git a/arch/arm/plat-mxc/devices/platform-ahci-imx.c b/arch/arm/plat-mxc/devices/platform-ahci-imx.c
new file mode 100644
index 000000000000..d8a56aee521b
--- /dev/null
+++ b/arch/arm/plat-mxc/devices/platform-ahci-imx.c
@@ -0,0 +1,156 @@
1/*
2 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
3 */
4
5/*
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21#include <linux/io.h>
22#include <linux/clk.h>
23#include <linux/err.h>
24#include <linux/device.h>
25#include <linux/dma-mapping.h>
26#include <asm/sizes.h>
27#include <mach/hardware.h>
28#include <mach/devices-common.h>
29
30#define imx_ahci_imx_data_entry_single(soc, _devid) \
31 { \
32 .devid = _devid, \
33 .iobase = soc ## _SATA_BASE_ADDR, \
34 .irq = soc ## _INT_SATA, \
35 }
36
37#ifdef CONFIG_SOC_IMX53
38const struct imx_ahci_imx_data imx53_ahci_imx_data __initconst =
39 imx_ahci_imx_data_entry_single(MX53, "imx53-ahci");
40#endif
41
42enum {
43 HOST_CAP = 0x00,
44 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
45 HOST_PORTS_IMPL = 0x0c,
46 HOST_TIMER1MS = 0xe0, /* Timer 1-ms */
47};
48
49static struct clk *sata_clk, *sata_ref_clk;
50
51/* AHCI module Initialization, if return 0, initialization is successful. */
52static int imx_sata_init(struct device *dev, void __iomem *addr)
53{
54 u32 tmpdata;
55 int ret = 0;
56 struct clk *clk;
57
58 sata_clk = clk_get(dev, "ahci");
59 if (IS_ERR(sata_clk)) {
60 dev_err(dev, "no sata clock.\n");
61 return PTR_ERR(sata_clk);
62 }
63 ret = clk_enable(sata_clk);
64 if (ret) {
65 dev_err(dev, "can't enable sata clock.\n");
66 goto put_sata_clk;
67 }
68
69 /* Get the AHCI SATA PHY CLK */
70 sata_ref_clk = clk_get(dev, "ahci_phy");
71 if (IS_ERR(sata_ref_clk)) {
72 dev_err(dev, "no sata ref clock.\n");
73 ret = PTR_ERR(sata_ref_clk);
74 goto release_sata_clk;
75 }
76 ret = clk_enable(sata_ref_clk);
77 if (ret) {
78 dev_err(dev, "can't enable sata ref clock.\n");
79 goto put_sata_ref_clk;
80 }
81
82 /* Get the AHB clock rate, and configure the TIMER1MS reg later */
83 clk = clk_get(dev, "ahci_dma");
84 if (IS_ERR(clk)) {
85 dev_err(dev, "no dma clock.\n");
86 ret = PTR_ERR(clk);
87 goto release_sata_ref_clk;
88 }
89 tmpdata = clk_get_rate(clk) / 1000;
90 clk_put(clk);
91
92 writel(tmpdata, addr + HOST_TIMER1MS);
93
94 tmpdata = readl(addr + HOST_CAP);
95 if (!(tmpdata & HOST_CAP_SSS)) {
96 tmpdata |= HOST_CAP_SSS;
97 writel(tmpdata, addr + HOST_CAP);
98 }
99
100 if (!(readl(addr + HOST_PORTS_IMPL) & 0x1))
101 writel((readl(addr + HOST_PORTS_IMPL) | 0x1),
102 addr + HOST_PORTS_IMPL);
103
104 return 0;
105
106release_sata_ref_clk:
107 clk_disable(sata_ref_clk);
108put_sata_ref_clk:
109 clk_put(sata_ref_clk);
110release_sata_clk:
111 clk_disable(sata_clk);
112put_sata_clk:
113 clk_put(sata_clk);
114
115 return ret;
116}
117
118static void imx_sata_exit(struct device *dev)
119{
120 clk_disable(sata_ref_clk);
121 clk_put(sata_ref_clk);
122
123 clk_disable(sata_clk);
124 clk_put(sata_clk);
125
126}
127struct platform_device *__init imx_add_ahci_imx(
128 const struct imx_ahci_imx_data *data,
129 const struct ahci_platform_data *pdata)
130{
131 struct resource res[] = {
132 {
133 .start = data->iobase,
134 .end = data->iobase + SZ_4K - 1,
135 .flags = IORESOURCE_MEM,
136 }, {
137 .start = data->irq,
138 .end = data->irq,
139 .flags = IORESOURCE_IRQ,
140 },
141 };
142
143 return imx_add_platform_device_dmamask(data->devid, 0,
144 res, ARRAY_SIZE(res),
145 pdata, sizeof(*pdata), DMA_BIT_MASK(32));
146}
147
148struct platform_device *__init imx53_add_ahci_imx(void)
149{
150 struct ahci_platform_data pdata = {
151 .init = imx_sata_init,
152 .exit = imx_sata_exit,
153 };
154
155 return imx_add_ahci_imx(&imx53_ahci_imx_data, &pdata);
156}
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index 524538aabc4b..f04e063f355d 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -301,3 +301,13 @@ struct platform_device *__init imx_add_spi_imx(
301struct platform_device *imx_add_imx_dma(void); 301struct platform_device *imx_add_imx_dma(void);
302struct platform_device *imx_add_imx_sdma(char *name, 302struct platform_device *imx_add_imx_sdma(char *name,
303 resource_size_t iobase, int irq, struct sdma_platform_data *pdata); 303 resource_size_t iobase, int irq, struct sdma_platform_data *pdata);
304
305#include <linux/ahci_platform.h>
306struct imx_ahci_imx_data {
307 const char *devid;
308 resource_size_t iobase;
309 resource_size_t irq;
310};
311struct platform_device *__init imx_add_ahci_imx(
312 const struct imx_ahci_imx_data *data,
313 const struct ahci_platform_data *pdata);