| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-id: <1395081118-15248-4-git-send-email-b.zolnierkie@samsung.com>
Date: Mon, 17 Mar 2014 19:31:57 +0100
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To: Tejun Heo <tj@...nel.org>
Cc: Sekhar Nori <nsekhar@...com>,
Kevin Hilman <khilman@...prootsystems.com>,
Viresh Kumar <viresh.linux@...il.com>,
Shiraz Hashim <shiraz.hashim@...com>,
linux-ide@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
davinci-linux-open-source@...ux.davincidsp.com,
spear-devel@...t.st.com, b.zolnierkie@...sung.com
Subject: [PATCH 3/4] ata: add new-style AHCI platform driver for DaVinci DA850
AHCI controller
The new driver is named ahci_da850 and is only compile tested. Once it
is tested on the real hardware and verified to work correctly, the legacy
platform code (which depends on the deprecated struct ahci_platform_data)
can be removed.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
drivers/ata/Kconfig | 9 +++
drivers/ata/Makefile | 1 +
drivers/ata/ahci_da850.c | 178 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 188 insertions(+)
create mode 100644 drivers/ata/ahci_da850.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 371e8890..6379a00 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -97,6 +97,15 @@ config SATA_AHCI_PLATFORM
If unsure, say N.
+config AHCI_DA850
+ tristate "DaVinci DA850 AHCI SATA support (experimental)"
+ depends on ARCH_DAVINCI_DA850
+ help
+ This option enables support for the DaVinci DA850 SoC's
+ onboard AHCI SATA.
+
+ If unsure, say N.
+
config AHCI_ST
tristate "ST AHCI SATA support"
depends on ARCH_STI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 6123e64..0646d83 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
obj-$(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-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o
diff --git a/drivers/ata/ahci_da850.c b/drivers/ata/ahci_da850.c
new file mode 100644
index 0000000..da874699
--- /dev/null
+++ b/drivers/ata/ahci_da850.c
@@ -0,0 +1,178 @@
+/*
+ * DaVinci DA850 AHCI SATA platform driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ */
+
+#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"
+
+extern void __iomem *da8xx_syscfg1_base;
+#define DA8XX_SYSCFG1_VIRT(x) (da8xx_syscfg1_base + (x))
+#define DA8XX_PWRDN_REG 0x18
+
+/* SATA PHY Control Register offset from AHCI base */
+#define SATA_P0PHYCR_REG 0x178
+
+#define SATA_PHY_MPY(x) ((x) << 0)
+#define SATA_PHY_LOS(x) ((x) << 6)
+#define SATA_PHY_RXCDR(x) ((x) << 10)
+#define SATA_PHY_RXEQ(x) ((x) << 13)
+#define SATA_PHY_TXSWING(x) ((x) << 19)
+#define SATA_PHY_ENPLL(x) ((x) << 31)
+
+static struct clk *da850_sata_clk;
+static unsigned long da850_sata_refclkpn = 100 * 1000 * 1000;
+
+/* Supported DA850 SATA crystal frequencies */
+#define KHZ_TO_HZ(freq) ((freq) * 1000)
+static unsigned long da850_sata_xtal[] = {
+ KHZ_TO_HZ(300000),
+ KHZ_TO_HZ(250000),
+ 0, /* Reserved */
+ KHZ_TO_HZ(187500),
+ KHZ_TO_HZ(150000),
+ KHZ_TO_HZ(125000),
+ KHZ_TO_HZ(120000),
+ KHZ_TO_HZ(100000),
+ KHZ_TO_HZ(75000),
+ KHZ_TO_HZ(60000),
+};
+
+static int da850_sata_init(struct device *dev, void __iomem *addr)
+{
+ int i, ret;
+ unsigned int val;
+
+ da850_sata_clk = clk_get(dev, NULL);
+ if (IS_ERR(da850_sata_clk))
+ return PTR_ERR(da850_sata_clk);
+
+ ret = clk_prepare_enable(da850_sata_clk);
+ if (ret)
+ goto err0;
+
+ /* Enable SATA clock receiver */
+ val = __raw_readl(DA8XX_SYSCFG1_VIRT(DA8XX_PWRDN_REG));
+ val &= ~BIT(0);
+ __raw_writel(val, DA8XX_SYSCFG1_VIRT(DA8XX_PWRDN_REG));
+
+ /* Get the multiplier needed for 1.5GHz PLL output */
+ for (i = 0; i < ARRAY_SIZE(da850_sata_xtal); i++)
+ if (da850_sata_xtal[i] == da850_sata_refclkpn)
+ break;
+
+ if (i == ARRAY_SIZE(da850_sata_xtal)) {
+ ret = -EINVAL;
+ goto err1;
+ }
+
+ val = SATA_PHY_MPY(i + 1) |
+ SATA_PHY_LOS(1) |
+ SATA_PHY_RXCDR(4) |
+ SATA_PHY_RXEQ(1) |
+ SATA_PHY_TXSWING(3) |
+ SATA_PHY_ENPLL(1);
+
+ __raw_writel(val, addr + SATA_P0PHYCR_REG);
+
+ return 0;
+
+err1:
+ clk_disable_unprepare(da850_sata_clk);
+err0:
+ clk_put(da850_sata_clk);
+ return ret;
+}
+
+static void da850_sata_exit(struct device *dev)
+{
+ clk_disable_unprepare(da850_sata_clk);
+ clk_put(da850_sata_clk);
+}
+
+static void ahci_da850_host_stop(struct ata_host *host)
+{
+ struct device *dev = host->dev;
+ struct ahci_host_priv *hpriv = host->private_data;
+
+ da850_sata_exit(dev);
+
+ ahci_platform_disable_resources(hpriv);
+}
+
+static struct ata_port_operations ahci_da850_port_ops = {
+ .inherits = &ahci_platform_ops,
+ .host_stop = ahci_da850_host_stop,
+};
+
+static const struct ata_port_info ahci_da850_port_info = {
+ .flags = AHCI_FLAG_COMMON,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_da850_port_ops,
+};
+
+static int ahci_da850_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ahci_host_priv *hpriv;
+ int rc;
+
+ hpriv = ahci_platform_get_resources(pdev);
+ if (IS_ERR(hpriv))
+ return PTR_ERR(hpriv);
+
+ rc = ahci_platform_enable_resources(hpriv);
+ if (rc)
+ return rc;
+
+ rc = da850_sata_init(dev, hpriv->mmio);
+ if (rc)
+ goto disable_resources;
+
+ rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info, 0, 0);
+ if (rc)
+ goto sata_exit;
+
+ return 0;
+sata_exit:
+ da850_sata_exit(dev);
+disable_resources:
+ ahci_platform_disable_resources(hpriv);
+ return rc;
+}
+
+static SIMPLE_DEV_PM_OPS(ahci_da850_pm_ops, ahci_platform_suspend,
+ ahci_platform_resume);
+
+static struct platform_device_id ahci_da850_platform_ids[] = {
+ { .name = "ahci" },
+ {}
+};
+MODULE_DEVICE_TABLE(platform, ahci_da850_platform_ids);
+
+static struct platform_driver ahci_da850_driver = {
+ .probe = ahci_da850_probe,
+ .remove = ata_platform_remove_one,
+ .driver = {
+ .name = "ahci_da850",
+ .owner = THIS_MODULE,
+ .pm = &ahci_da850_pm_ops,
+ },
+ .id_table = ahci_da850_platform_ids,
+};
+module_platform_driver(ahci_da850_driver);
+
+MODULE_DESCRIPTION("DaVinci DA850 AHCI SATA platform driver");
+MODULE_AUTHOR("Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>");
+MODULE_LICENSE("GPL");
--
1.8.2.3
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists