[RFC PATCH 2/2] MX53 Enable the AHCI SATA on MX53 LOCO

[Richard Zhu <Hong-Xing.Zhu@xxxxxxxxxxxxx>]

Signed-off-by: Richard Zhu <Hong-Xing.Zhu@xxxxxxxxxxxxx>
---
 arch/arm/mach-mx5/board-mx53_loco.c |  120 +++++++++++++++++++++++++++++++++++
 1 files changed, 120 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 0a18f8d..9a7bbea 100644
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -23,11 +23,13 @@
 #include <linux/fec.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/ahci_platform.h>
 
 #include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/imx-uart.h>
 #include <mach/iomux-mx53.h>
+#include <mach/ahci_sata.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -203,6 +205,123 @@ static const struct imxi2c_platform_data mx53_loco_i2c_data __initconst = {
 	.bitrate = 100000,
 };
 
+/* HW Initialization, if return 0, initialization is successful. */
+static int sata_init(struct device *dev, void __iomem *addr)
+{
+	void __iomem *mmio;
+	struct clk *clk;
+	int ret = 0;
+	u32 tmpdata;
+
+	clk = clk_get(dev, "imx_sata_clk");
+	ret = IS_ERR(clk);
+	if (ret) {
+		printk(KERN_ERR "IMX AHCI can't get clock.\n");
+		return ret;
+	}
+	ret = clk_enable(clk);
+	if (ret) {
+		printk(KERN_ERR "IMX AHCI can't enable clock.\n");
+		clk_put(clk);
+		return ret;
+	}
+
+	/* FSL IMX AHCI SATA uses the internal usb phy1 clk on loco */
+	clk = clk_get(dev, "usb_phy1");
+	ret = IS_ERR(clk);
+	if (ret) {
+		printk(KERN_ERR "IMX AHCI can't get USB PHY1 CLK.\n");
+		goto no_input_clk;
+	}
+	ret = clk_enable(clk);
+	if (ret) {
+		printk(KERN_ERR "IMX AHCI Can't enable USB PHY1 clock.\n");
+		clk_put(clk);
+		goto no_input_clk;
+	}
+
+	/* Get the AHB clock rate, and configure the TIMER1MS reg later */
+	clk = clk_get(NULL, "ahb_clk");
+	ret = IS_ERR(clk);
+	if (ret) {
+		printk(KERN_ERR "IMX AHCI can't get AHB clock.\n");
+		goto no_clk;
+	}
+
+	mmio = ioremap(MX53_SATA_BASE_ADDR, SZ_2K);
+	if (mmio == NULL) {
+		printk(KERN_ERR "Failed to map SATA REGS\n");
+		goto no_clk;
+	}
+
+	tmpdata = readl(mmio + HOST_CAP);
+	if (!(tmpdata & HOST_CAP_SSS)) {
+		tmpdata |= HOST_CAP_SSS;
+		writel(tmpdata, mmio + HOST_CAP);
+	}
+
+	if (!(readl(mmio + HOST_PORTS_IMPL) & 0x1))
+		writel((readl(mmio + HOST_PORTS_IMPL) | 0x1),
+			mmio + HOST_PORTS_IMPL);
+
+	tmpdata = clk_get_rate(clk) / 1000;
+	writel(tmpdata, mmio + HOST_TIMER1MS);
+
+	iounmap(mmio);
+
+	return ret;
+
+no_clk:
+	clk = clk_get(dev, "usb_phy1");
+	if (IS_ERR(clk)) {
+		clk = NULL;
+		printk(KERN_ERR "IMX AHCI can't get USB PHY1 CLK.\n");
+	} else {
+		clk_disable(clk);
+		clk_put(clk);
+	}
+
+no_input_clk:
+	clk = clk_get(dev, "imx_sata_clk");
+	if (IS_ERR(clk)) {
+		clk = NULL;
+		printk(KERN_ERR "IMX AHCI can't get clock.\n");
+	} else {
+		clk_disable(clk);
+		clk_put(clk);
+	}
+
+	return ret;
+}
+
+static void sata_exit(struct device *dev)
+{
+	struct clk *clk;
+
+	clk = clk_get(dev, "usb_phy1");
+	if (IS_ERR(clk)) {
+		clk = NULL;
+		printk(KERN_ERR "IMX AHCI can't get USB PHY1 CLK.\n");
+	} else {
+		clk_disable(clk);
+		clk_put(clk);
+	}
+
+	clk = clk_get(dev, "imx_sata_clk");
+	if (IS_ERR(clk)) {
+		clk = NULL;
+		printk(KERN_ERR "IMX AHCI can't get clock.\n");
+	} else {
+		clk_disable(clk);
+		clk_put(clk);
+	}
+}
+
+static struct ahci_platform_data sata_data = {
+	.init = sata_init,
+	.exit = sata_exit,
+};
+
 static void __init mx53_loco_board_init(void)
 {
 	mxc_iomux_v3_setup_multiple_pads(mx53_loco_pads,
@@ -215,6 +334,7 @@ static void __init mx53_loco_board_init(void)
 	imx53_add_imx_i2c(1, &mx53_loco_i2c_data);
 	imx53_add_sdhci_esdhc_imx(0, NULL);
 	imx53_add_sdhci_esdhc_imx(2, NULL);
+	imx53_add_ahci_imx(0, &sata_data);
 }
 
 static void __init mx53_loco_timer_init(void)
-- 
1.7.1


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