dm: imx: cm_fx6: Support driver model for SATA

Add support for using driver model for SATA with the cm_fx6 board. The old
code remains for now to permit testing.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index c59884a8c319489b1ab3bb33d2de64ed0fd28fc7..ecefe394f1addf1bc9ba170a68d8f49a9e4e9ed9 100644 (file)
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -9,7 +9,9 @@
  */
 
 #include <common.h>
+#include <ahci.h>
 #include <dm.h>
+#include <dwc_ahsata.h>
 #include <fsl_esdhc.h>
 #include <miiphy.h>
 #include <mtd_node.h>
@@ -29,6 +31,7 @@
 #include <asm/io.h>
 #include <asm/gpio.h>
 #include <dm/platform_data/serial_mxc.h>
+#include <dm/device-internal.h>
 #include <jffs2/load_kernel.h>
 #include "common.h"
 #include "../common/eeprom.h"
@@ -206,6 +209,8 @@ static int cm_fx6_setup_issd(void)
 }
 
 #define CM_FX6_SATA_INIT_RETRIES       10
+
+# if !CONFIG_IS_ENABLED(AHCI)
 int sata_initialize(void)
 {
        int err, i;
@@ -246,6 +251,7 @@ int sata_stop(void)
 
        return 0;
 }
+# endif
 #else
 static int cm_fx6_setup_issd(void) { return 0; }
 #endif
@@ -757,3 +763,66 @@ U_BOOT_DEVICE(cm_fx6_serial) = {
        .name   = "serial_mxc",
        .platdata = &cm_fx6_mxc_serial_plat,
 };
+
+#if CONFIG_IS_ENABLED(AHCI)
+static int sata_imx_probe(struct udevice *dev)
+{
+       int i, err;
+
+       /* Make sure this gpio has logical 0 value */
+       gpio_direction_output(CM_FX6_SATA_PWLOSS_INT, 0);
+       udelay(100);
+       cm_fx6_sata_power(1);
+
+       for (i = 0; i < CM_FX6_SATA_INIT_RETRIES; i++) {
+               err = setup_sata();
+               if (err) {
+                       printf("SATA setup failed: %d\n", err);
+                       return err;
+               }
+
+               udelay(100);
+
+               err = dwc_ahsata_probe(dev);
+               if (!err)
+                       break;
+
+               /* There is no device on the SATA port */
+               if (sata_dm_port_status(0, 0) == 0)
+                       break;
+
+               /* There's a device, but link not established. Retry */
+               device_remove(dev, DM_REMOVE_NORMAL);
+       }
+
+       return 0;
+}
+
+static int sata_imx_remove(struct udevice *dev)
+{
+       cm_fx6_sata_power(0);
+       mdelay(250);
+
+       return 0;
+}
+
+struct ahci_ops sata_imx_ops = {
+       .port_status = dwc_ahsata_port_status,
+       .reset  = dwc_ahsata_bus_reset,
+       .scan   = dwc_ahsata_scan,
+};
+
+static const struct udevice_id sata_imx_ids[] = {
+       { .compatible = "fsl,imx6q-ahci" },
+       { }
+};
+
+U_BOOT_DRIVER(sata_imx) = {
+       .name           = "dwc_ahci",
+       .id             = UCLASS_AHCI,
+       .of_match       = sata_imx_ids,
+       .ops            = &sata_imx_ops,
+       .probe          = sata_imx_probe,
+       .remove         = sata_imx_remove,  /* reset bus to stop it */
+};
+#endif /* AHCI */