Add support for the Qualcomm AHCI SATA controller that exists on several
SoC and specifically the IPQ806x family of chips. The IPQ806x SATA support
requires the associated IPQ806x SATA PHY Driver to be enabled as well.
Signed-off-by: Kumar Gala <[email protected]>
---
v2:
* Fixed MODULE_LICENSE to be GPL v2
drivers/ata/Kconfig | 10 ++++++
drivers/ata/Makefile | 1 +
drivers/ata/ahci_qcom.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 97 insertions(+)
create mode 100644 drivers/ata/ahci_qcom.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 7671dba..aa88648 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -132,6 +132,16 @@ config AHCI_MVEBU
If unsure, say N.
+config AHCI_QCOM
+ tristate "Qualcomm AHCI SATA support"
+ depends on ARCH_QCOM
+ help
+ This option enables support for AHCI SATA controller
+ integrated into Qualcomm ARM SoC chipsets. For more
+ information please refer to http://www.qualcomm.com/chipsets.
+
+ If unsure, say N.
+
config AHCI_SUNXI
tristate "Allwinner sunxi AHCI SATA support"
depends on ARCH_SUNXI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 5a02aee..15401e9 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
obj-$(CONFIG_AHCI_DA850) += ahci_da850.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_MVEBU) += ahci_mvebu.o libahci.o libahci_platform.o
+obj-$(CONFIG_AHCI_QCOM) += ahci_qcom.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o libahci.o libahci_platform.o
diff --git a/drivers/ata/ahci_qcom.c b/drivers/ata/ahci_qcom.c
new file mode 100644
index 0000000..bfb7a77
--- /dev/null
+++ b/drivers/ata/ahci_qcom.c
@@ -0,0 +1,86 @@
+/*
+ * Qualcomm ARM SoC AHCI SATA platform driver
+ *
+ * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
+ *
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/libata.h>
+#include <linux/ahci_platform.h>
+#include "ahci.h"
+
+static const struct ata_port_info qcom_ahci_port_info = {
+ .flags = AHCI_FLAG_COMMON,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_platform_ops,
+};
+
+static int qcom_ahci_probe(struct platform_device *pdev)
+{
+ struct ahci_host_priv *hpriv;
+ struct clk *rxoob_clk;
+ int rc;
+
+ hpriv = ahci_platform_get_resources(pdev);
+ if (IS_ERR(hpriv))
+ return PTR_ERR(hpriv);
+
+ /* Try and set the rxoob clk to 100Mhz */
+ rxoob_clk = of_clk_get_by_name(pdev->dev.of_node, "rxoob");
+ if (IS_ERR(rxoob_clk))
+ return PTR_ERR(rxoob_clk);
+
+ rc = clk_set_rate(rxoob_clk, 100000000);
+ if (rc)
+ return rc;
+
+ rc = ahci_platform_enable_resources(hpriv);
+ if (rc)
+ return rc;
+
+ rc = ahci_platform_init_host(pdev, hpriv, &qcom_ahci_port_info, 0, 0);
+ if (rc)
+ goto disable_resources;
+
+ return 0;
+disable_resources:
+ ahci_platform_disable_resources(hpriv);
+ return rc;
+}
+
+static const struct of_device_id qcom_ahci_of_match[] = {
+ { .compatible = "qcom,msm-ahci", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, qcom_ahci_of_match);
+
+static struct platform_driver qcom_ahci_driver = {
+ .probe = qcom_ahci_probe,
+ .remove = ata_platform_remove_one,
+ .driver = {
+ .name = "qcom_ahci_qcom",
+ .owner = THIS_MODULE,
+ .of_match_table = qcom_ahci_of_match,
+ },
+};
+module_platform_driver(qcom_ahci_driver);
+
+MODULE_DESCRIPTION("Qualcomm AHCI SATA platform driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("ahci:qcom");
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
Hi,
On Friday, June 13, 2014 11:16:03 AM Kumar Gala wrote:
> Add support for the Qualcomm AHCI SATA controller that exists on several
> SoC and specifically the IPQ806x family of chips. The IPQ806x SATA support
> requires the associated IPQ806x SATA PHY Driver to be enabled as well.
>
> Signed-off-by: Kumar Gala <[email protected]>
> ---
> v2:
> * Fixed MODULE_LICENSE to be GPL v2
>
> drivers/ata/Kconfig | 10 ++++++
> drivers/ata/Makefile | 1 +
> drivers/ata/ahci_qcom.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 97 insertions(+)
> create mode 100644 drivers/ata/ahci_qcom.c
>
> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
> index 7671dba..aa88648 100644
> --- a/drivers/ata/Kconfig
> +++ b/drivers/ata/Kconfig
> @@ -132,6 +132,16 @@ config AHCI_MVEBU
>
> If unsure, say N.
>
> +config AHCI_QCOM
> + tristate "Qualcomm AHCI SATA support"
> + depends on ARCH_QCOM
> + help
> + This option enables support for AHCI SATA controller
> + integrated into Qualcomm ARM SoC chipsets. For more
> + information please refer to http://www.qualcomm.com/chipsets.
> +
> + If unsure, say N.
> +
> config AHCI_SUNXI
> tristate "Allwinner sunxi AHCI SATA support"
> depends on ARCH_SUNXI
> diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
> index 5a02aee..15401e9 100644
> --- a/drivers/ata/Makefile
> +++ b/drivers/ata/Makefile
> @@ -13,6 +13,7 @@ obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
> obj-$(CONFIG_AHCI_DA850) += ahci_da850.o libahci.o libahci_platform.o
> obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
> obj-$(CONFIG_AHCI_MVEBU) += ahci_mvebu.o libahci.o libahci_platform.o
> +obj-$(CONFIG_AHCI_QCOM) += ahci_qcom.o libahci.o libahci_platform.o
> obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o
> obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o
> obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o libahci.o libahci_platform.o
> diff --git a/drivers/ata/ahci_qcom.c b/drivers/ata/ahci_qcom.c
> new file mode 100644
> index 0000000..bfb7a77
> --- /dev/null
> +++ b/drivers/ata/ahci_qcom.c
> @@ -0,0 +1,86 @@
> +/*
> + * Qualcomm ARM SoC AHCI SATA platform driver
> + *
> + * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
> + *
> + * Copyright (c) 2014, The Linux Foundation. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/pm.h>
> +#include <linux/device.h>
> +#include <linux/platform_device.h>
> +#include <linux/libata.h>
> +#include <linux/ahci_platform.h>
> +#include "ahci.h"
> +
> +static const struct ata_port_info qcom_ahci_port_info = {
> + .flags = AHCI_FLAG_COMMON,
> + .pio_mask = ATA_PIO4,
> + .udma_mask = ATA_UDMA6,
> + .port_ops = &ahci_platform_ops,
> +};
> +
> +static int qcom_ahci_probe(struct platform_device *pdev)
> +{
> + struct ahci_host_priv *hpriv;
> + struct clk *rxoob_clk;
> + int rc;
> +
> + hpriv = ahci_platform_get_resources(pdev);
> + if (IS_ERR(hpriv))
> + return PTR_ERR(hpriv);
> +
> + /* Try and set the rxoob clk to 100Mhz */
> + rxoob_clk = of_clk_get_by_name(pdev->dev.of_node, "rxoob");
> + if (IS_ERR(rxoob_clk))
> + return PTR_ERR(rxoob_clk);
> +
> + rc = clk_set_rate(rxoob_clk, 100000000);
Shouldn't the clk_prepare_enable() be called first?
> + if (rc)
> + return rc;
of_clk_get_by_name() gets an extra reference on the clock so clk_put()
should be called on failure.
> + rc = ahci_platform_enable_resources(hpriv);
> + if (rc)
> + return rc;
> +
> + rc = ahci_platform_init_host(pdev, hpriv, &qcom_ahci_port_info, 0, 0);
> + if (rc)
> + goto disable_resources;
> +
> + return 0;
> +disable_resources:
> + ahci_platform_disable_resources(hpriv);
> + return rc;
> +}
> +
> +static const struct of_device_id qcom_ahci_of_match[] = {
> + { .compatible = "qcom,msm-ahci", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, qcom_ahci_of_match);
> +
> +static struct platform_driver qcom_ahci_driver = {
> + .probe = qcom_ahci_probe,
> + .remove = ata_platform_remove_one,
> + .driver = {
> + .name = "qcom_ahci_qcom",
> + .owner = THIS_MODULE,
> + .of_match_table = qcom_ahci_of_match,
> + },
This driver lacks PM suspend/resume support. I assume that
the IPQ806x platform also doesn't support suspend/resume yet
(if so a comment in the driver code about this would be useful),
otherwise the driver should be fixed.
> +};
> +module_platform_driver(qcom_ahci_driver);
> +
> +MODULE_DESCRIPTION("Qualcomm AHCI SATA platform driver");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("ahci:qcom");
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
On Jun 17, 2014, at 7:25 AM, Bartlomiej Zolnierkiewicz <[email protected]> wrote:
>
> Hi,
>
> On Friday, June 13, 2014 11:16:03 AM Kumar Gala wrote:
>> Add support for the Qualcomm AHCI SATA controller that exists on several
>> SoC and specifically the IPQ806x family of chips. The IPQ806x SATA support
>> requires the associated IPQ806x SATA PHY Driver to be enabled as well.
>>
>> Signed-off-by: Kumar Gala <[email protected]>
>> ---
>> v2:
>> * Fixed MODULE_LICENSE to be GPL v2
>>
>> drivers/ata/Kconfig | 10 ++++++
>> drivers/ata/Makefile | 1 +
>> drivers/ata/ahci_qcom.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 97 insertions(+)
>> create mode 100644 drivers/ata/ahci_qcom.c
>>
>> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
>> index 7671dba..aa88648 100644
>> --- a/drivers/ata/Kconfig
>> +++ b/drivers/ata/Kconfig
>> @@ -132,6 +132,16 @@ config AHCI_MVEBU
>>
>> If unsure, say N.
>>
>> +config AHCI_QCOM
>> + tristate "Qualcomm AHCI SATA support"
>> + depends on ARCH_QCOM
>> + help
>> + This option enables support for AHCI SATA controller
>> + integrated into Qualcomm ARM SoC chipsets. For more
>> + information please refer to http://www.qualcomm.com/chipsets.
>> +
>> + If unsure, say N.
>> +
>> config AHCI_SUNXI
>> tristate "Allwinner sunxi AHCI SATA support"
>> depends on ARCH_SUNXI
>> diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
>> index 5a02aee..15401e9 100644
>> --- a/drivers/ata/Makefile
>> +++ b/drivers/ata/Makefile
>> @@ -13,6 +13,7 @@ obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
>> obj-$(CONFIG_AHCI_DA850) += ahci_da850.o libahci.o libahci_platform.o
>> obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
>> obj-$(CONFIG_AHCI_MVEBU) += ahci_mvebu.o libahci.o libahci_platform.o
>> +obj-$(CONFIG_AHCI_QCOM) += ahci_qcom.o libahci.o libahci_platform.o
>> obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o
>> obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o
>> obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o libahci.o libahci_platform.o
>> diff --git a/drivers/ata/ahci_qcom.c b/drivers/ata/ahci_qcom.c
>> new file mode 100644
>> index 0000000..bfb7a77
>> --- /dev/null
>> +++ b/drivers/ata/ahci_qcom.c
>> @@ -0,0 +1,86 @@
>> +/*
>> + * Qualcomm ARM SoC AHCI SATA platform driver
>> + *
>> + * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
>> + *
>> + * Copyright (c) 2014, The Linux Foundation. All rights reserved.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License version 2 and
>> + * only version 2 as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + */
>> +
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/pm.h>
>> +#include <linux/device.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/libata.h>
>> +#include <linux/ahci_platform.h>
>> +#include "ahci.h"
>> +
>> +static const struct ata_port_info qcom_ahci_port_info = {
>> + .flags = AHCI_FLAG_COMMON,
>> + .pio_mask = ATA_PIO4,
>> + .udma_mask = ATA_UDMA6,
>> + .port_ops = &ahci_platform_ops,
>> +};
>> +
>> +static int qcom_ahci_probe(struct platform_device *pdev)
>> +{
>> + struct ahci_host_priv *hpriv;
>> + struct clk *rxoob_clk;
>> + int rc;
>> +
>> + hpriv = ahci_platform_get_resources(pdev);
>> + if (IS_ERR(hpriv))
>> + return PTR_ERR(hpriv);
>> +
>> + /* Try and set the rxoob clk to 100Mhz */
>> + rxoob_clk = of_clk_get_by_name(pdev->dev.of_node, "rxoob");
>> + if (IS_ERR(rxoob_clk))
>> + return PTR_ERR(rxoob_clk);
>> +
>> + rc = clk_set_rate(rxoob_clk, 100000000);
>
> Shouldn't the clk_prepare_enable() be called first?
I don?t believe there is any requirement for clk_prepare_enable to be called first.
>
>> + if (rc)
>> + return rc;
>
> of_clk_get_by_name() gets an extra reference on the clock so clk_put()
> should be called on failure.
will fix.
>
>> + rc = ahci_platform_enable_resources(hpriv);
>> + if (rc)
>> + return rc;
>> +
>> + rc = ahci_platform_init_host(pdev, hpriv, &qcom_ahci_port_info, 0, 0);
>> + if (rc)
>> + goto disable_resources;
>> +
>> + return 0;
>> +disable_resources:
>> + ahci_platform_disable_resources(hpriv);
>> + return rc;
>> +}
>> +
>> +static const struct of_device_id qcom_ahci_of_match[] = {
>> + { .compatible = "qcom,msm-ahci", },
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, qcom_ahci_of_match);
>> +
>> +static struct platform_driver qcom_ahci_driver = {
>> + .probe = qcom_ahci_probe,
>> + .remove = ata_platform_remove_one,
>> + .driver = {
>> + .name = "qcom_ahci_qcom",
>> + .owner = THIS_MODULE,
>> + .of_match_table = qcom_ahci_of_match,
>> + },
>
> This driver lacks PM suspend/resume support. I assume that
> the IPQ806x platform also doesn't support suspend/resume yet
> (if so a comment in the driver code about this would be useful),
> otherwise the driver should be fixed.
Correct, do you want the comment in the commit message or the driver itself?
>
>> +};
>> +module_platform_driver(qcom_ahci_driver);
>> +
>> +MODULE_DESCRIPTION("Qualcomm AHCI SATA platform driver");
>> +MODULE_LICENSE("GPL v2");
>> +MODULE_ALIAS("ahci:qcom");
>
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
On Tuesday, June 17, 2014 10:42:36 AM Kumar Gala wrote:
>
> On Jun 17, 2014, at 7:25 AM, Bartlomiej Zolnierkiewicz <[email protected]> wrote:
[...]
> >> +static struct platform_driver qcom_ahci_driver = {
> >> + .probe = qcom_ahci_probe,
> >> + .remove = ata_platform_remove_one,
> >> + .driver = {
> >> + .name = "qcom_ahci_qcom",
> >> + .owner = THIS_MODULE,
> >> + .of_match_table = qcom_ahci_of_match,
> >> + },
> >
> > This driver lacks PM suspend/resume support. I assume that
> > the IPQ806x platform also doesn't support suspend/resume yet
> > (if so a comment in the driver code about this would be useful),
> > otherwise the driver should be fixed.
>
> Correct, do you want the comment in the commit message or the driver itself?
I would prefer the comment in the driver itself.
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics