ahci: cosmetics and cleanup

- print the correct speed
- print all the AHCI capability flags
(information taken from Linux kernel driver)
- clean up some comments

For example, this might show the following string:
AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x3 impl SATA mode

Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Commit-Ready: Stefan Reinauer <reinauer@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>

diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c
index af31c97..0a7ad81 100644 (file)
--- a/drivers/block/ahci.c
+++ b/drivers/block/ahci.c
@@ -194,7 +194,7 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
                /* set irq mask (enables interrupts) */
                writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
 
-               /*register linkup ports */
+               /* register linkup ports */
                tmp = readl(port_mmio + PORT_SCR_STAT);
                debug("Port %d status: 0x%x\n", i, tmp);
                if ((tmp & 0xf) == 0x03)
@@ -222,12 +222,13 @@ static void ahci_print_info(struct ahci_probe_ent *probe_ent)
        u16 cc;
 #endif
        volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base;
-       u32 vers, cap, impl, speed;
+       u32 vers, cap, cap2, impl, speed;
        const char *speed_s;
        const char *scc_s;
 
        vers = readl(mmio + HOST_VERSION);
        cap = probe_ent->cap;
+       cap2 = readl(mmio + HOST_CAP2);
        impl = probe_ent->port_map;
 
        speed = (cap >> 20) & 0xf;
@@ -235,6 +236,8 @@ static void ahci_print_info(struct ahci_probe_ent *probe_ent)
                speed_s = "1.5";
        else if (speed == 2)
                speed_s = "3";
+       else if (speed == 3)
+               speed_s = "6";
        else
                speed_s = "?";
 
@@ -260,8 +263,9 @@ static void ahci_print_info(struct ahci_probe_ent *probe_ent)
               ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);
 
        printf("flags: "
-              "%s%s%s%s%s%s"
-              "%s%s%s%s%s%s%s\n",
+              "%s%s%s%s%s%s%s"
+              "%s%s%s%s%s%s%s"
+              "%s%s%s%s%s%s\n",
               cap & (1 << 31) ? "64bit " : "",
               cap & (1 << 30) ? "ncq " : "",
               cap & (1 << 28) ? "ilck " : "",
@@ -272,9 +276,16 @@ static void ahci_print_info(struct ahci_probe_ent *probe_ent)
               cap & (1 << 19) ? "nz " : "",
               cap & (1 << 18) ? "only " : "",
               cap & (1 << 17) ? "pmp " : "",
+              cap & (1 << 16) ? "fbss " : "",
               cap & (1 << 15) ? "pio " : "",
               cap & (1 << 14) ? "slum " : "",
-              cap & (1 << 13) ? "part " : "");
+              cap & (1 << 13) ? "part " : "",
+              cap & (1 << 7) ? "ccc " : "",
+              cap & (1 << 6) ? "ems " : "",
+              cap & (1 << 5) ? "sxs " : "",
+              cap2 & (1 << 2) ? "apst " : "",
+              cap2 & (1 << 1) ? "nvmp " : "",
+              cap2 & (1 << 0) ? "boh " : "");
 }
 
 #ifndef CONFIG_SCSI_AHCI_PLAT
@@ -369,7 +380,7 @@ static void ahci_set_feature(u8 port)
        u32 cmd_fis_len = 5;    /* five dwords */
        u8 fis[20];
 
-       /*set feature */
+       /* set feature */
        memset(fis, 0, 20);
        fis[0] = 0x27;
        fis[1] = 1 << 7;
@@ -383,7 +394,7 @@ static void ahci_set_feature(u8 port)
        readl(port_mmio + PORT_CMD_ISSUE);
 
        if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
-               printf("set feature error!\n");
+               printf("set feature error on port %d!\n", port);
        }
 }
 

diff --git a/include/ahci.h b/include/ahci.h
index c4fb9e7..babbdc6 100644 (file)
--- a/include/ahci.h
+++ b/include/ahci.h
@@ -51,6 +51,7 @@
 #define HOST_IRQ_STAT          0x08 /* interrupt status */
 #define HOST_PORTS_IMPL                0x0c /* bitmap of implemented ports */
 #define HOST_VERSION           0x10 /* AHCI spec. version compliancy */
+#define HOST_CAP2              0x24 /* host capabilities, extended */
 
 /* HOST_CTL bits */
 #define HOST_RESET             (1 << 0)  /* reset controller; self-clear */