1 files changed, 126 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index fc4e98e..2f7e719 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -14,6 +14,8 @@
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/serial_8250.h>
+#include <linux/ahci_platform.h>
+#include <linux/clk.h>
 
 #include <mach/cputype.h>
 #include <mach/common.h>
@@ -33,6 +35,7 @@
 #define DA8XX_SPI0_BASE			0x01c41000
 #define DA830_SPI1_BASE			0x01e12000
 #define DA8XX_LCD_CNTRL_BASE		0x01e13000
+#define DA850_SATA_BASE			0x01e18000
 #define DA850_MMCSD1_BASE		0x01e1b000
 #define DA8XX_EMAC_CPPI_PORT_BASE	0x01e20000
 #define DA8XX_EMAC_CPGMACSS_BASE	0x01e22000
@@ -842,3 +845,126 @@ int __init da8xx_register_spi(int instance, struct spi_board_info *info,
 
 	return platform_device_register(&da8xx_spi_device[instance]);
 }
+
+#ifdef CONFIG_ARCH_DAVINCI_DA850
+
+static struct resource da850_sata_resources[] = {
+	{
+		.start	= DA850_SATA_BASE,
+		.end	= DA850_SATA_BASE + 0x1fff,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= IRQ_DA850_SATAINT,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+/* 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;
+
+/* 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_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(da850_sata_clk);
+err0:
+	clk_put(da850_sata_clk);
+	return ret;
+}
+
+static void da850_sata_exit(struct device *dev)
+{
+	clk_disable(da850_sata_clk);
+	clk_put(da850_sata_clk);
+}
+
+static struct ahci_platform_data da850_sata_pdata = {
+	.init	= da850_sata_init,
+	.exit	= da850_sata_exit,
+};
+
+static u64 da850_sata_dmamask = DMA_BIT_MASK(32);
+
+static struct platform_device da850_sata_device = {
+	.name	= "ahci",
+	.id	= -1,
+	.dev	= {
+		.platform_data		= &da850_sata_pdata,
+		.dma_mask		= &da850_sata_dmamask,
+		.coherent_dma_mask	= DMA_BIT_MASK(32),
+	},
+	.num_resources	= ARRAY_SIZE(da850_sata_resources),
+	.resource	= da850_sata_resources,
+};
+
+int __init da850_register_sata(unsigned long refclkpn)
+{
+	da850_sata_refclkpn = refclkpn;
+	if (!da850_sata_refclkpn)
+		return -EINVAL;
+
+	return platform_device_register(&da850_sata_device);
+}
+#endif