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author | Suman Tripathi <stripathi@apm.com> | 2015-05-11 11:36:15 +0300 |
---|---|---|
committer | Tejun Heo <tj@kernel.org> | 2015-05-11 14:26:48 +0300 |
commit | c9802a4be6611520dd99d91d0d9c4efcaa0fa281 (patch) | |
tree | 1fa844c8d02e752f3a16a9bff3610934c51419d8 /drivers/ata/ahci_xgene.c | |
parent | 5903b1643f41ccc0cb3a0cde1d12b1c942914317 (diff) | |
download | linux-c9802a4be6611520dd99d91d0d9c4efcaa0fa281.tar.xz |
ata: ahci_xgene: Add AHCI Support for 2nd HW version of APM X-Gene SoC AHCI SATA Host controller.
This patch enables full AHCI feature support for APM X-Gene SoC SATA
host controller. The following errata's are removed:
1. 2a0bdff6b95 ("ahci-xgene: fix the dma state machine lockup for the
IDENTIFY DEVICE PIO mode command")
2. 09c32aaa368 ("ahci_xgene: Fix the dma state machine lockup for the
ATA_CMD_SMART PIO mode command")
3. 1540035da71 ("ahci_xgene: Implement the xgene_ahci_poll_reg_val to
support PMP")
4. a3a84bc7c88 ("ahci_xgene: Implement the workaround to support PMP
enumeration and discovery")
5. 1102407bb71 ("ahci_xgene: Fix the DMA state machine lockup for the
ATA_CMD_PACKET PIO mode command")
6. 72f79f9e35b ("ahci_xgene: Removing NCQ support from the APM X-Gene
SoC AHCI SATA Host Controller driver")
In addition, enable PMP support for APM X-Gene SoC and enable FBS
support for second generation APM X-Gene SoC.
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci_xgene.c')
-rw-r--r-- | drivers/ata/ahci_xgene.c | 105 |
1 files changed, 86 insertions, 19 deletions
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c index 2b78510d94dd..2add250d1555 100644 --- a/drivers/ata/ahci_xgene.c +++ b/drivers/ata/ahci_xgene.c @@ -27,6 +27,7 @@ #include <linux/platform_device.h> #include <linux/ahci_platform.h> #include <linux/of_address.h> +#include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/phy/phy.h> #include "ahci.h" @@ -84,6 +85,11 @@ /* Max retry for link down */ #define MAX_LINK_DOWN_RETRY 3 +enum xgene_ahci_version { + XGENE_AHCI_V1 = 1, + XGENE_AHCI_V2, +}; + struct xgene_ahci_context { struct ahci_host_priv *hpriv; struct device *dev; @@ -542,7 +548,7 @@ softreset_retry: return rc; } -static struct ata_port_operations xgene_ahci_ops = { +static struct ata_port_operations xgene_ahci_v1_ops = { .inherits = &ahci_ops, .host_stop = xgene_ahci_host_stop, .hardreset = xgene_ahci_hardreset, @@ -552,11 +558,25 @@ static struct ata_port_operations xgene_ahci_ops = { .pmp_softreset = xgene_ahci_pmp_softreset }; -static const struct ata_port_info xgene_ahci_port_info = { +static const struct ata_port_info xgene_ahci_v1_port_info = { .flags = AHCI_FLAG_COMMON | ATA_FLAG_PMP, .pio_mask = ATA_PIO4, .udma_mask = ATA_UDMA6, - .port_ops = &xgene_ahci_ops, + .port_ops = &xgene_ahci_v1_ops, +}; + +static struct ata_port_operations xgene_ahci_v2_ops = { + .inherits = &ahci_ops, + .host_stop = xgene_ahci_host_stop, + .hardreset = xgene_ahci_hardreset, + .read_id = xgene_ahci_read_id, +}; + +static const struct ata_port_info xgene_ahci_v2_port_info = { + .flags = AHCI_FLAG_COMMON | ATA_FLAG_PMP, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &xgene_ahci_v2_ops, }; static int xgene_ahci_hw_init(struct ahci_host_priv *hpriv) @@ -629,12 +649,32 @@ static struct scsi_host_template ahci_platform_sht = { AHCI_SHT(DRV_NAME), }; +#ifdef CONFIG_ACPI +static const struct acpi_device_id xgene_ahci_acpi_match[] = { + { "APMC0D0D", XGENE_AHCI_V1}, + { "APMC0D32", XGENE_AHCI_V2}, + {}, +}; +MODULE_DEVICE_TABLE(acpi, xgene_ahci_acpi_match); +#endif + +static const struct of_device_id xgene_ahci_of_match[] = { + {.compatible = "apm,xgene-ahci", .data = (void *) XGENE_AHCI_V1}, + {.compatible = "apm,xgene-ahci-v2", .data = (void *) XGENE_AHCI_V2}, + {}, +}; +MODULE_DEVICE_TABLE(of, xgene_ahci_of_match); + static int xgene_ahci_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct ahci_host_priv *hpriv; struct xgene_ahci_context *ctx; struct resource *res; + const struct of_device_id *of_devid; + enum xgene_ahci_version version = XGENE_AHCI_V1; + const struct ata_port_info *ppi[] = { &xgene_ahci_v1_port_info, + &xgene_ahci_v2_port_info }; int rc; hpriv = ahci_platform_get_resources(pdev); @@ -677,6 +717,37 @@ static int xgene_ahci_probe(struct platform_device *pdev) ctx->csr_mux = csr; } + of_devid = of_match_device(xgene_ahci_of_match, dev); + if (of_devid) { + if (of_devid->data) + version = (enum xgene_ahci_version) of_devid->data; + } +#ifdef CONFIG_ACPI + else { + const struct acpi_device_id *acpi_id; + struct acpi_device_info *info; + acpi_status status; + + acpi_id = acpi_match_device(xgene_ahci_acpi_match, &pdev->dev); + if (!acpi_id) { + dev_warn(&pdev->dev, "No node entry in ACPI table. Assume version1\n"); + version = XGENE_AHCI_V1; + } + + if (acpi_id->driver_data) { + version = (enum xgene_ahci_version) acpi_id->driver_data; + status = acpi_get_object_info(ACPI_HANDLE(&pdev->dev), &info); + if (ACPI_FAILURE(status)) { + dev_warn(&pdev->dev, "%s: Error reading device info. Assume version1\n", + __func__); + version = XGENE_AHCI_V1; + } + if (info->valid & ACPI_VALID_CID) + version = XGENE_AHCI_V2; + } + } +#endif + dev_dbg(dev, "VAddr 0x%p Mmio VAddr 0x%p\n", ctx->csr_core, hpriv->mmio); @@ -704,9 +775,19 @@ static int xgene_ahci_probe(struct platform_device *pdev) /* Configure the host controller */ xgene_ahci_hw_init(hpriv); skip_clk_phy: - hpriv->flags = AHCI_HFLAG_NO_PMP | AHCI_HFLAG_NO_NCQ; - rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info, + switch (version) { + case XGENE_AHCI_V1: + hpriv->flags = AHCI_HFLAG_NO_NCQ; + break; + case XGENE_AHCI_V2: + hpriv->flags |= AHCI_HFLAG_YES_FBS | AHCI_HFLAG_EDGE_IRQ; + break; + default: + break; + } + + rc = ahci_platform_init_host(pdev, hpriv, ppi[version - 1], &ahci_platform_sht); if (rc) goto disable_resources; @@ -719,20 +800,6 @@ disable_resources: return rc; } -#ifdef CONFIG_ACPI -static const struct acpi_device_id xgene_ahci_acpi_match[] = { - { "APMC0D0D", }, - { } -}; -MODULE_DEVICE_TABLE(acpi, xgene_ahci_acpi_match); -#endif - -static const struct of_device_id xgene_ahci_of_match[] = { - {.compatible = "apm,xgene-ahci"}, - {}, -}; -MODULE_DEVICE_TABLE(of, xgene_ahci_of_match); - static struct platform_driver xgene_ahci_driver = { .probe = xgene_ahci_probe, .remove = ata_platform_remove_one, |