[PATCH v3 0/2] add CNS3xxx AHCI support

[PATCH v3 0/2] add CNS3xxx AHCI support

[mkl0301]

From: Mac Lin <mkl0301@gmail.com>

v3:
 - Make the SoC-specific changes into ahci_platform.c directly.
 - Some cosmetic code changes

v2: http://www.spinics.net/lists/linux-ide/msg39766.html
 - Switch ahci_platform to module device table matching to add SoC specific support

v1: http://www.spinics.net/lists/arm-kernel/msg106236.html
 - Add CNS3xxx SoC specific AHCI support

This patchset is based on linux-2.6.37

Mac Lin (2):
      ahci_platform: switch to module device table matching
      ahci_platform: add support for CNS3xxx SoC devices

 arch/arm/mach-cns3xxx/devices.c |    2 +-
 drivers/ata/Kconfig             |   11 ++++++++
 drivers/ata/ahci_platform.c     |   52 ++++++++++++++++++++++++++++++++++++++-
 3 files changed, 63 insertions(+), 2 deletions(-)

[PATCH v3 0/2] add CNS3xxx AHCI support

[mkl0301 at gmail.com]

From: Mac Lin <mkl0301@gmail.com>

v3:
 - Make the SoC-specific changes into ahci_platform.c directly.
 - Some cosmetic code changes

v2: http://www.spinics.net/lists/linux-ide/msg39766.html
 - Switch ahci_platform to module device table matching to add SoC specific support

v1: http://www.spinics.net/lists/arm-kernel/msg106236.html
 - Add CNS3xxx SoC specific AHCI support

This patchset is based on linux-2.6.37

Mac Lin (2):
      ahci_platform: switch to module device table matching
      ahci_platform: add support for CNS3xxx SoC devices

 arch/arm/mach-cns3xxx/devices.c |    2 +-
 drivers/ata/Kconfig             |   11 ++++++++
 drivers/ata/ahci_platform.c     |   52 ++++++++++++++++++++++++++++++++++++++-
 3 files changed, 63 insertions(+), 2 deletions(-)

[PATCH v3 1/2] ahci_platform: switch to module device table matching

[mkl0301]

From: Mac Lin <mkl0301@gmail.com>

Switch the driver to use module device table matching mechanism to add SoC-specific parts to the generic driver.

Signed-off-by: Mac Lin <mkl0301@gmail.com>
---
 drivers/ata/ahci_platform.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 6fef1fa..25d98c8 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -19,6 +19,7 @@
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/libata.h>
 #include <linux/ahci_platform.h>
 #include "ahci.h"
@@ -29,6 +30,7 @@ static struct scsi_host_template ahci_platform_sht = {
 
 static int __init ahci_probe(struct platform_device *pdev)
 {
+	const struct platform_device_id *platid = platform_get_device_id(pdev);
 	struct device *dev = &pdev->dev;
 	struct ahci_platform_data *pdata = dev->platform_data;
 	struct ata_port_info pi = {
@@ -46,6 +48,9 @@ static int __init ahci_probe(struct platform_device *pdev)
 	int i;
 	int rc;
 
+	if (!pdata && platid && platid->driver_data)
+		pdata = (void *)platid->driver_data;
+
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!mem) {
 		dev_err(dev, "no mmio space\n");
@@ -171,12 +176,19 @@ static int __devexit ahci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct platform_device_id ahci_pltfm_ids[] = {
+	{ "ahci", },
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, ahci_pltfm_ids);
+
 static struct platform_driver ahci_driver = {
 	.remove = __devexit_p(ahci_remove),
 	.driver = {
 		.name = "ahci",
 		.owner = THIS_MODULE,
 	},
+	.id_table	= ahci_pltfm_ids,
 };
 
 static int __init ahci_init(void)
@@ -194,4 +206,3 @@ module_exit(ahci_exit);
 MODULE_DESCRIPTION("AHCI SATA platform driver");
 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ahci");
-- 
1.7.3

[PATCH v3 1/2] ahci_platform: switch to module device table matching

[mkl0301 at gmail.com]

From: Mac Lin <mkl0301@gmail.com>

Switch the driver to use module device table matching mechanism to add SoC-specific parts to the generic driver.

Signed-off-by: Mac Lin <mkl0301@gmail.com>
---
 drivers/ata/ahci_platform.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 6fef1fa..25d98c8 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -19,6 +19,7 @@
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/libata.h>
 #include <linux/ahci_platform.h>
 #include "ahci.h"
@@ -29,6 +30,7 @@ static struct scsi_host_template ahci_platform_sht = {
 
 static int __init ahci_probe(struct platform_device *pdev)
 {
+	const struct platform_device_id *platid = platform_get_device_id(pdev);
 	struct device *dev = &pdev->dev;
 	struct ahci_platform_data *pdata = dev->platform_data;
 	struct ata_port_info pi = {
@@ -46,6 +48,9 @@ static int __init ahci_probe(struct platform_device *pdev)
 	int i;
 	int rc;
 
+	if (!pdata && platid && platid->driver_data)
+		pdata = (void *)platid->driver_data;
+
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!mem) {
 		dev_err(dev, "no mmio space\n");
@@ -171,12 +176,19 @@ static int __devexit ahci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct platform_device_id ahci_pltfm_ids[] = {
+	{ "ahci", },
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, ahci_pltfm_ids);
+
 static struct platform_driver ahci_driver = {
 	.remove = __devexit_p(ahci_remove),
 	.driver = {
 		.name = "ahci",
 		.owner = THIS_MODULE,
 	},
+	.id_table	= ahci_pltfm_ids,
 };
 
 static int __init ahci_init(void)
@@ -194,4 +206,3 @@ module_exit(ahci_exit);
 MODULE_DESCRIPTION("AHCI SATA platform driver");
 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ahci");
-- 
1.7.3

[PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[mkl0301]

From: Mac Lin <mkl0301@gmail.com>

CNS3xxx override the softreset function of ahci_platform ahci_softreset by
cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
different PMP setting of the previous sent H2D Reg FIS.

Following describe the isssue with original ahci_platform driver on
linux-2.6.37-rc3, arm/cns3xxx.

If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
directly to the board, the disk cannot be found due to software reset always
failed.

    ahci ahci.0: forcing PORTS_IMPL to 0x3
    ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
    ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
    scsi0 : ahci_platform
    scsi1 : ahci_platform
    ata1: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 65
    ata2: SATA max UDMA/133 mmio [mem 0x83000000-0x83ffffff] port 0x180 irq 65
    ata2: SATA link down (SStatus 0 SControl 300)
    ata1: link is slow to respond, please be patient (ready=0)
    ata1: softreset failed (device not ready)
    ata1: link is slow to respond, please be patient (ready=0)
    ata1: softreset failed (device not ready)
    ata1: link is slow to respond, please be patient (ready=0)
    ata1: softreset failed (device not ready)
    ata1: limiting SATA link speed to 1.5 Gbps
    ata1: SATA link down (SStatus 1 SControl 310)

While using multiplier with CONFIG_SATA_PMP enabled, or using disks directly
without CONFIG_SATA_PMP have no issue. It seems the device is sending D2H Reg
FIS, but controller is not reflecting it on any known means.

Signed-off-by: Mac Lin <mkl0301@gmail.com>
---
 arch/arm/mach-cns3xxx/devices.c |    2 +-
 drivers/ata/Kconfig             |   11 +++++++++++
 drivers/ata/ahci_platform.c     |   39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-cns3xxx/devices.c b/arch/arm/mach-cns3xxx/devices.c
index 50b4d31..b496f02 100644
--- a/arch/arm/mach-cns3xxx/devices.c
+++ b/arch/arm/mach-cns3xxx/devices.c
@@ -40,7 +40,7 @@ static struct resource cns3xxx_ahci_resource[] = {
 static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32);
 
 static struct platform_device cns3xxx_ahci_pdev = {
-	.name		= "ahci",
+	.name		= "ahci-cns3xxx",
 	.id		= 0,
 	.resource	= cns3xxx_ahci_resource,
 	.num_resources	= ARRAY_SIZE(cns3xxx_ahci_resource),
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 36e2319..5d8b1a3 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -75,6 +75,17 @@ config SATA_AHCI_PLATFORM
 
 	  If unsure, say N.
 
+config SATA_AHCI_CNS3XXX
+	bool "AHCI Support on the Cavium Networks CNS3xxx SOC"
+	depends on ARCH_CNS3XXX
+	depends on SATA_AHCI_PLATFORM
+	help
+	  This option enables AHCI platform driver to support CNS3xxx
+	  System-on-Chip devices. This is only needed when using CNS3xxx AHCI
+	  controller.
+
+	  If unsure, say N.
+
 config SATA_FSL
 	tristate "Freescale 3.0Gbps SATA support"
 	depends on FSL_SOC
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 25d98c8..7d6957f 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -176,8 +176,47 @@ static int __devexit ahci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_SATA_AHCI_CNS3XXX
+/*
+ * TODO: move cns3xxx_ahci_init to here after cns3xxx_pwr*() calls are
+ * thread-safe
+ */
+
+static int cns3xxx_ahci_softreset(struct ata_link *link, unsigned int *class,
+			  unsigned long deadline)
+{
+	int pmp = sata_srst_pmp(link);
+	int ret;
+
+	ret = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
+	if (pmp && ret)
+		return ahci_do_softreset(link, class, 0, deadline,
+			ahci_check_ready);
+	return ret;
+}
+
+static struct ata_port_operations cns3xxx_ahci_ops = {
+	.inherits		= &ahci_ops,
+	.softreset		= cns3xxx_ahci_softreset,
+};
+
+static const struct ata_port_info cns3xxx_ata_port_info = {
+	.flags		= AHCI_FLAG_COMMON,
+	.pio_mask	= ATA_PIO4,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &cns3xxx_ahci_ops,
+};
+
+struct ahci_platform_data cns3xxx_ahci_platform_data = {
+	.ata_port_info	= &cns3xxx_ata_port_info,
+};
+#endif
+
 static const struct platform_device_id ahci_pltfm_ids[] = {
 	{ "ahci", },
+#ifdef CONFIG_SATA_AHCI_CNS3XXX
+	{ "ahci-cns3xxx", (kernel_ulong_t)&cns3xxx_ahci_platform_data},
+#endif
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, ahci_pltfm_ids);
-- 
1.7.3

[PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[mkl0301 at gmail.com]

From: Mac Lin <mkl0301@gmail.com>

CNS3xxx override the softreset function of ahci_platform ahci_softreset by
cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
different PMP setting of the previous sent H2D Reg FIS.

Following describe the isssue with original ahci_platform driver on
linux-2.6.37-rc3, arm/cns3xxx.

If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
directly to the board, the disk cannot be found due to software reset always
failed.

    ahci ahci.0: forcing PORTS_IMPL to 0x3
    ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
    ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
    scsi0 : ahci_platform
    scsi1 : ahci_platform
    ata1: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 65
    ata2: SATA max UDMA/133 mmio [mem 0x83000000-0x83ffffff] port 0x180 irq 65
    ata2: SATA link down (SStatus 0 SControl 300)
    ata1: link is slow to respond, please be patient (ready=0)
    ata1: softreset failed (device not ready)
    ata1: link is slow to respond, please be patient (ready=0)
    ata1: softreset failed (device not ready)
    ata1: link is slow to respond, please be patient (ready=0)
    ata1: softreset failed (device not ready)
    ata1: limiting SATA link speed to 1.5 Gbps
    ata1: SATA link down (SStatus 1 SControl 310)

While using multiplier with CONFIG_SATA_PMP enabled, or using disks directly
without CONFIG_SATA_PMP have no issue. It seems the device is sending D2H Reg
FIS, but controller is not reflecting it on any known means.

Signed-off-by: Mac Lin <mkl0301@gmail.com>
---
 arch/arm/mach-cns3xxx/devices.c |    2 +-
 drivers/ata/Kconfig             |   11 +++++++++++
 drivers/ata/ahci_platform.c     |   39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-cns3xxx/devices.c b/arch/arm/mach-cns3xxx/devices.c
index 50b4d31..b496f02 100644
--- a/arch/arm/mach-cns3xxx/devices.c
+++ b/arch/arm/mach-cns3xxx/devices.c
@@ -40,7 +40,7 @@ static struct resource cns3xxx_ahci_resource[] = {
 static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32);
 
 static struct platform_device cns3xxx_ahci_pdev = {
-	.name		= "ahci",
+	.name		= "ahci-cns3xxx",
 	.id		= 0,
 	.resource	= cns3xxx_ahci_resource,
 	.num_resources	= ARRAY_SIZE(cns3xxx_ahci_resource),
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 36e2319..5d8b1a3 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -75,6 +75,17 @@ config SATA_AHCI_PLATFORM
 
 	  If unsure, say N.
 
+config SATA_AHCI_CNS3XXX
+	bool "AHCI Support on the Cavium Networks CNS3xxx SOC"
+	depends on ARCH_CNS3XXX
+	depends on SATA_AHCI_PLATFORM
+	help
+	  This option enables AHCI platform driver to support CNS3xxx
+	  System-on-Chip devices. This is only needed when using CNS3xxx AHCI
+	  controller.
+
+	  If unsure, say N.
+
 config SATA_FSL
 	tristate "Freescale 3.0Gbps SATA support"
 	depends on FSL_SOC
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 25d98c8..7d6957f 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -176,8 +176,47 @@ static int __devexit ahci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_SATA_AHCI_CNS3XXX
+/*
+ * TODO: move cns3xxx_ahci_init to here after cns3xxx_pwr*() calls are
+ * thread-safe
+ */
+
+static int cns3xxx_ahci_softreset(struct ata_link *link, unsigned int *class,
+			  unsigned long deadline)
+{
+	int pmp = sata_srst_pmp(link);
+	int ret;
+
+	ret = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
+	if (pmp && ret)
+		return ahci_do_softreset(link, class, 0, deadline,
+			ahci_check_ready);
+	return ret;
+}
+
+static struct ata_port_operations cns3xxx_ahci_ops = {
+	.inherits		= &ahci_ops,
+	.softreset		= cns3xxx_ahci_softreset,
+};
+
+static const struct ata_port_info cns3xxx_ata_port_info = {
+	.flags		= AHCI_FLAG_COMMON,
+	.pio_mask	= ATA_PIO4,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &cns3xxx_ahci_ops,
+};
+
+struct ahci_platform_data cns3xxx_ahci_platform_data = {
+	.ata_port_info	= &cns3xxx_ata_port_info,
+};
+#endif
+
 static const struct platform_device_id ahci_pltfm_ids[] = {
 	{ "ahci", },
+#ifdef CONFIG_SATA_AHCI_CNS3XXX
+	{ "ahci-cns3xxx", (kernel_ulong_t)&cns3xxx_ahci_platform_data},
+#endif
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, ahci_pltfm_ids);
-- 
1.7.3

Re: [PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[Lin Mac]

Hi Jeff,

2011/1/7  <mkl0301@gmail.com>:
> From: Mac Lin <mkl0301@gmail.com>
>
> CNS3xxx override the softreset function of ahci_platform ahci_softreset by
> cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
> pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
> different PMP setting of the previous sent H2D Reg FIS.
>
> Following describe the isssue with original ahci_platform driver on
> linux-2.6.37-rc3, arm/cns3xxx.
>
> If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
> directly to the board, the disk cannot be found due to software reset always
> failed.
>
>    ahci ahci.0: forcing PORTS_IMPL to 0x3
>    ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
>    ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
>    scsi0 : ahci_platform
>    scsi1 : ahci_platform
>    ata1: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 65
>    ata2: SATA max UDMA/133 mmio [mem 0x83000000-0x83ffffff] port 0x180 irq 65
>    ata2: SATA link down (SStatus 0 SControl 300)
>    ata1: link is slow to respond, please be patient (ready=0)
>    ata1: softreset failed (device not ready)
>    ata1: link is slow to respond, please be patient (ready=0)
>    ata1: softreset failed (device not ready)
>    ata1: link is slow to respond, please be patient (ready=0)
>    ata1: softreset failed (device not ready)
>    ata1: limiting SATA link speed to 1.5 Gbps
>    ata1: SATA link down (SStatus 1 SControl 310)
>
> While using multiplier with CONFIG_SATA_PMP enabled, or using disks directly
> without CONFIG_SATA_PMP have no issue. It seems the device is sending D2H Reg
> FIS, but controller is not reflecting it on any known means.
>
> Signed-off-by: Mac Lin <mkl0301@gmail.com>
> ---
>  arch/arm/mach-cns3xxx/devices.c |    2 +-
>  drivers/ata/Kconfig             |   11 +++++++++++
>  drivers/ata/ahci_platform.c     |   39 +++++++++++++++++++++++++++++++++++++++
>  3 files changed, 51 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-cns3xxx/devices.c b/arch/arm/mach-cns3xxx/devices.c
> index 50b4d31..b496f02 100644
> --- a/arch/arm/mach-cns3xxx/devices.c
> +++ b/arch/arm/mach-cns3xxx/devices.c
> @@ -40,7 +40,7 @@ static struct resource cns3xxx_ahci_resource[] = {
>  static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32);
>
>  static struct platform_device cns3xxx_ahci_pdev = {
> -       .name           = "ahci",
> +       .name           = "ahci-cns3xxx",
>        .id             = 0,
>        .resource       = cns3xxx_ahci_resource,
>        .num_resources  = ARRAY_SIZE(cns3xxx_ahci_resource),
> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
> index 36e2319..5d8b1a3 100644
> --- a/drivers/ata/Kconfig
> +++ b/drivers/ata/Kconfig
> @@ -75,6 +75,17 @@ config SATA_AHCI_PLATFORM
>
>          If unsure, say N.
>
> +config SATA_AHCI_CNS3XXX
> +       bool "AHCI Support on the Cavium Networks CNS3xxx SOC"
> +       depends on ARCH_CNS3XXX
> +       depends on SATA_AHCI_PLATFORM
> +       help
> +         This option enables AHCI platform driver to support CNS3xxx
> +         System-on-Chip devices. This is only needed when using CNS3xxx AHCI
> +         controller.
> +
> +         If unsure, say N.
> +
>  config SATA_FSL
>        tristate "Freescale 3.0Gbps SATA support"
>        depends on FSL_SOC
> diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
> index 25d98c8..7d6957f 100644
> --- a/drivers/ata/ahci_platform.c
> +++ b/drivers/ata/ahci_platform.c
> @@ -176,8 +176,47 @@ static int __devexit ahci_remove(struct platform_device *pdev)
>        return 0;
>  }
>
> +#ifdef CONFIG_SATA_AHCI_CNS3XXX
> +/*
> + * TODO: move cns3xxx_ahci_init to here after cns3xxx_pwr*() calls are
> + * thread-safe
> + */
> +
> +static int cns3xxx_ahci_softreset(struct ata_link *link, unsigned int *class,
> +                         unsigned long deadline)
> +{
> +       int pmp = sata_srst_pmp(link);
> +       int ret;
> +
> +       ret = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
> +       if (pmp && ret)
> +               return ahci_do_softreset(link, class, 0, deadline,
> +                       ahci_check_ready);
> +       return ret;
> +}
> +
> +static struct ata_port_operations cns3xxx_ahci_ops = {
> +       .inherits               = &ahci_ops,
> +       .softreset              = cns3xxx_ahci_softreset,
> +};
> +
> +static const struct ata_port_info cns3xxx_ata_port_info = {
> +       .flags          = AHCI_FLAG_COMMON,
> +       .pio_mask       = ATA_PIO4,
> +       .udma_mask      = ATA_UDMA6,
> +       .port_ops       = &cns3xxx_ahci_ops,
> +};
> +
> +struct ahci_platform_data cns3xxx_ahci_platform_data = {
> +       .ata_port_info  = &cns3xxx_ata_port_info,
> +};
> +#endif
> +
>  static const struct platform_device_id ahci_pltfm_ids[] = {
>        { "ahci", },
> +#ifdef CONFIG_SATA_AHCI_CNS3XXX
> +       { "ahci-cns3xxx", (kernel_ulong_t)&cns3xxx_ahci_platform_data},
> +#endif
>        { },
>  };
>  MODULE_DEVICE_TABLE(platform, ahci_pltfm_ids);
> --
> 1.7.3
>
>
The code is less readable with macro here and there. It would be more
complicated if more SoC-specific code added.
I really prefer the original way.

Best Regards,
Mac Lin

[PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[Lin Mac]

Hi Jeff,

2011/1/7  <mkl0301@gmail.com>:
> From: Mac Lin <mkl0301@gmail.com>
>
> CNS3xxx override the softreset function of ahci_platform ahci_softreset by
> cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
> pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
> different PMP setting of the previous sent H2D Reg FIS.
>
> Following describe the isssue with original ahci_platform driver on
> linux-2.6.37-rc3, arm/cns3xxx.
>
> If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
> directly to the board, the disk cannot be found due to software reset always
> failed.
>
> ? ?ahci ahci.0: forcing PORTS_IMPL to 0x3
> ? ?ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
> ? ?ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
> ? ?scsi0 : ahci_platform
> ? ?scsi1 : ahci_platform
> ? ?ata1: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 65
> ? ?ata2: SATA max UDMA/133 mmio [mem 0x83000000-0x83ffffff] port 0x180 irq 65
> ? ?ata2: SATA link down (SStatus 0 SControl 300)
> ? ?ata1: link is slow to respond, please be patient (ready=0)
> ? ?ata1: softreset failed (device not ready)
> ? ?ata1: link is slow to respond, please be patient (ready=0)
> ? ?ata1: softreset failed (device not ready)
> ? ?ata1: link is slow to respond, please be patient (ready=0)
> ? ?ata1: softreset failed (device not ready)
> ? ?ata1: limiting SATA link speed to 1.5 Gbps
> ? ?ata1: SATA link down (SStatus 1 SControl 310)
>
> While using multiplier with CONFIG_SATA_PMP enabled, or using disks directly
> without CONFIG_SATA_PMP have no issue. It seems the device is sending D2H Reg
> FIS, but controller is not reflecting it on any known means.
>
> Signed-off-by: Mac Lin <mkl0301@gmail.com>
> ---
> ?arch/arm/mach-cns3xxx/devices.c | ? ?2 +-
> ?drivers/ata/Kconfig ? ? ? ? ? ? | ? 11 +++++++++++
> ?drivers/ata/ahci_platform.c ? ? | ? 39 +++++++++++++++++++++++++++++++++++++++
> ?3 files changed, 51 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-cns3xxx/devices.c b/arch/arm/mach-cns3xxx/devices.c
> index 50b4d31..b496f02 100644
> --- a/arch/arm/mach-cns3xxx/devices.c
> +++ b/arch/arm/mach-cns3xxx/devices.c
> @@ -40,7 +40,7 @@ static struct resource cns3xxx_ahci_resource[] = {
> ?static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32);
>
> ?static struct platform_device cns3xxx_ahci_pdev = {
> - ? ? ? .name ? ? ? ? ? = "ahci",
> + ? ? ? .name ? ? ? ? ? = "ahci-cns3xxx",
> ? ? ? ?.id ? ? ? ? ? ? = 0,
> ? ? ? ?.resource ? ? ? = cns3xxx_ahci_resource,
> ? ? ? ?.num_resources ?= ARRAY_SIZE(cns3xxx_ahci_resource),
> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
> index 36e2319..5d8b1a3 100644
> --- a/drivers/ata/Kconfig
> +++ b/drivers/ata/Kconfig
> @@ -75,6 +75,17 @@ config SATA_AHCI_PLATFORM
>
> ? ? ? ? ?If unsure, say N.
>
> +config SATA_AHCI_CNS3XXX
> + ? ? ? bool "AHCI Support on the Cavium Networks CNS3xxx SOC"
> + ? ? ? depends on ARCH_CNS3XXX
> + ? ? ? depends on SATA_AHCI_PLATFORM
> + ? ? ? help
> + ? ? ? ? This option enables AHCI platform driver to support CNS3xxx
> + ? ? ? ? System-on-Chip devices. This is only needed when using CNS3xxx AHCI
> + ? ? ? ? controller.
> +
> + ? ? ? ? If unsure, say N.
> +
> ?config SATA_FSL
> ? ? ? ?tristate "Freescale 3.0Gbps SATA support"
> ? ? ? ?depends on FSL_SOC
> diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
> index 25d98c8..7d6957f 100644
> --- a/drivers/ata/ahci_platform.c
> +++ b/drivers/ata/ahci_platform.c
> @@ -176,8 +176,47 @@ static int __devexit ahci_remove(struct platform_device *pdev)
> ? ? ? ?return 0;
> ?}
>
> +#ifdef CONFIG_SATA_AHCI_CNS3XXX
> +/*
> + * TODO: move cns3xxx_ahci_init to here after cns3xxx_pwr*() calls are
> + * thread-safe
> + */
> +
> +static int cns3xxx_ahci_softreset(struct ata_link *link, unsigned int *class,
> + ? ? ? ? ? ? ? ? ? ? ? ? unsigned long deadline)
> +{
> + ? ? ? int pmp = sata_srst_pmp(link);
> + ? ? ? int ret;
> +
> + ? ? ? ret = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
> + ? ? ? if (pmp && ret)
> + ? ? ? ? ? ? ? return ahci_do_softreset(link, class, 0, deadline,
> + ? ? ? ? ? ? ? ? ? ? ? ahci_check_ready);
> + ? ? ? return ret;
> +}
> +
> +static struct ata_port_operations cns3xxx_ahci_ops = {
> + ? ? ? .inherits ? ? ? ? ? ? ? = &ahci_ops,
> + ? ? ? .softreset ? ? ? ? ? ? ?= cns3xxx_ahci_softreset,
> +};
> +
> +static const struct ata_port_info cns3xxx_ata_port_info = {
> + ? ? ? .flags ? ? ? ? ?= AHCI_FLAG_COMMON,
> + ? ? ? .pio_mask ? ? ? = ATA_PIO4,
> + ? ? ? .udma_mask ? ? ?= ATA_UDMA6,
> + ? ? ? .port_ops ? ? ? = &cns3xxx_ahci_ops,
> +};
> +
> +struct ahci_platform_data cns3xxx_ahci_platform_data = {
> + ? ? ? .ata_port_info ?= &cns3xxx_ata_port_info,
> +};
> +#endif
> +
> ?static const struct platform_device_id ahci_pltfm_ids[] = {
> ? ? ? ?{ "ahci", },
> +#ifdef CONFIG_SATA_AHCI_CNS3XXX
> + ? ? ? { "ahci-cns3xxx", (kernel_ulong_t)&cns3xxx_ahci_platform_data},
> +#endif
> ? ? ? ?{ },
> ?};
> ?MODULE_DEVICE_TABLE(platform, ahci_pltfm_ids);
> --
> 1.7.3
>
>
The code is less readable with macro here and there. It would be more
complicated if more SoC-specific code added.
I really prefer the original way.

Best Regards,
Mac Lin

Re: [PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[Ben Dooks]

On Fri, Jan 07, 2011 at 02:04:33AM +0800, Lin Mac wrote:
> Hi Jeff,
> 
> 2011/1/7  <mkl0301@gmail.com>:
> > From: Mac Lin <mkl0301@gmail.com>
> >
> > CNS3xxx override the softreset function of ahci_platform ahci_softreset by
> > cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
> > pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
> > different PMP setting of the previous sent H2D Reg FIS.
> >
> > Following describe the isssue with original ahci_platform driver on
> > linux-2.6.37-rc3, arm/cns3xxx.
> >
> > If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
> > directly to the board, the disk cannot be found due to software reset always

> complicated if more SoC-specific code added.
> I really prefer the original way.

Is there a reference to the original?

-- 
Ben Dooks, ben@fluff.org, http://www.fluff.org/ben/

Large Hadron Colada: A large Pina Colada that makes the universe disappear.

[PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[Ben Dooks]

On Fri, Jan 07, 2011 at 02:04:33AM +0800, Lin Mac wrote:
> Hi Jeff,
> 
> 2011/1/7  <mkl0301@gmail.com>:
> > From: Mac Lin <mkl0301@gmail.com>
> >
> > CNS3xxx override the softreset function of ahci_platform ahci_softreset by
> > cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
> > pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
> > different PMP setting of the previous sent H2D Reg FIS.
> >
> > Following describe the isssue with original ahci_platform driver on
> > linux-2.6.37-rc3, arm/cns3xxx.
> >
> > If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
> > directly to the board, the disk cannot be found due to software reset always

> complicated if more SoC-specific code added.
> I really prefer the original way.

Is there a reference to the original?

-- 
Ben Dooks, ben at fluff.org, http://www.fluff.org/ben/

Large Hadron Colada: A large Pina Colada that makes the universe disappear.

Re: [PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[Lin Mac]

2011/1/7 Ben Dooks <ben@trinity.fluff.org>:
> On Fri, Jan 07, 2011 at 02:04:33AM +0800, Lin Mac wrote:
>> Hi Jeff,
>>
>> 2011/1/7  <mkl0301@gmail.com>:
>> > From: Mac Lin <mkl0301@gmail.com>
>> >
>> > CNS3xxx override the softreset function of ahci_platform ahci_softreset by
>> > cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
>> > pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
>> > different PMP setting of the previous sent H2D Reg FIS.
>> >
>> > Following describe the isssue with original ahci_platform driver on
>> > linux-2.6.37-rc3, arm/cns3xxx.
>> >
>> > If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
>> > directly to the board, the disk cannot be found due to software reset always
>
>> complicated if more SoC-specific code added.
>> I really prefer the original way.
>
> Is there a reference to the original?
v2: http://www.spinics.net/lists/linux-ide/msg39766.html

Best Regards,
Mac Lin

[PATCH v3 2/2] ahci_platform: add support for CNS3xxx SoC devices

[Lin Mac]

2011/1/7 Ben Dooks <ben@trinity.fluff.org>:
> On Fri, Jan 07, 2011 at 02:04:33AM +0800, Lin Mac wrote:
>> Hi Jeff,
>>
>> 2011/1/7 ?<mkl0301@gmail.com>:
>> > From: Mac Lin <mkl0301@gmail.com>
>> >
>> > CNS3xxx override the softreset function of ahci_platform ahci_softreset by
>> > cns3xxx_ahci_softreset, which would retry ahci_do_softreset again with pmp=0 if
>> > pmp=15 failed, for the controller has problem receiving D2H Reg FIS of the
>> > different PMP setting of the previous sent H2D Reg FIS.
>> >
>> > Following describe the isssue with original ahci_platform driver on
>> > linux-2.6.37-rc3, arm/cns3xxx.
>> >
>> > If CONFIG_SATA_PMP is enabled, while not using multiplier and connect the disks
>> > directly to the board, the disk cannot be found due to software reset always
>
>> complicated if more SoC-specific code added.
>> I really prefer the original way.
>
> Is there a reference to the original?
v2: http://www.spinics.net/lists/linux-ide/msg39766.html

Best Regards,
Mac Lin