Changeset 2c617b0 in mainline

Timestamp:

2011-04-02T18:39:07Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c2be0e5

Parents:

4d946647

Message:

Basic OHCI initialization

Location:

uspace/drv/ohci

Files:

• hc.c (modified) (5 diffs)
• ohci_regs.h (modified) (2 diffs)
• root_hub.c (modified) (1 diff)

uspace/drv/ohci/hc.c

@@ -45 +45 @@
 
 static int interrupt_emulator(hc_t *instance);
+static void hc_gain_control(hc_t *instance);
+static void hc_init_hw(hc_t *instance);
 /*----------------------------------------------------------------------------*/
 int hc_register_hub(hc_t *instance, ddf_fun_t *hub_fun)
@@ -92 +94 @@
         }
 
+        hc_gain_control(instance);
+
         rh_init(&instance->rh, dev, instance->registers);
+
+        hc_init_hw(instance);
 
         /* TODO: implement */
@@ -117 +123 @@
                 rh_interrupt(&instance->rh);
 
+        usb_log_info("OHCI interrupt: %x.\n", status);
+
         /* TODO: Check for further interrupt causes */
         /* TODO: implement */
@@ -126 +134 @@
         usb_log_info("Started interrupt emulator.\n");
         while (1) {
-                uint32_t status = instance->registers->interrupt_status;
+                const uint32_t status = instance->registers->interrupt_status;
                 instance->registers->interrupt_status = status;
                 hc_interrupt(instance, status);
@@ -133 +141 @@
         return EOK;
 }
+/*----------------------------------------------------------------------------*/
+void hc_gain_control(hc_t *instance)
+{
+        assert(instance);
+        /* Interrupt routing enabled => smm driver is active */
+        if (instance->registers->control & C_IR) {
+                usb_log_info("Found SMM driver requesting ownership change.\n");
+                instance->registers->command_status |= CS_OCR;
+                while (instance->registers->control & C_IR) {
+                        async_usleep(1000);
+                }
+                usb_log_info("Ownership taken from SMM driver.\n");
+                return;
+        }
+
+        const unsigned hc_status =
+            (instance->registers->control >> C_HCFS_SHIFT) & C_HCFS_MASK;
+        /* Interrupt routing disabled && status != USB_RESET => BIOS active */
+        if (hc_status != C_HCFS_RESET) {
+                usb_log_info("Found BIOS driver.\n");
+                if (hc_status == C_HCFS_OPERATIONAL) {
+                        usb_log_info("HC operational(BIOS).\n");
+                        return;
+                }
+                /* HC is suspended assert resume for 20ms */
+                instance->registers->control &= (C_HCFS_RESUME << C_HCFS_SHIFT);
+                async_usleep(20000);
+                return;
+        }
+
+        /* HC is in reset (hw startup) => no other driver
+         * maintain reset for at least the time specified in USB spec (50 ms)*/
+        async_usleep(50000);
+}
+/*----------------------------------------------------------------------------*/
+void hc_init_hw(hc_t *instance)
+{
+        assert(instance);
+        const uint32_t fm_interval = instance->registers->fm_interval;
+        instance->registers->command_status = CS_HCR;
+        async_usleep(10);
+        instance->registers->fm_interval = fm_interval;
+        assert((instance->registers->command_status & CS_HCR) == 0);
+        /* hc is now in suspend state */
+
+        instance->registers->control &= (C_HCFS_OPERATIONAL << C_HCFS_SHIFT);
+        usb_log_info("OHCI HC up and running.\n");
+}
 /**
  * @}

uspace/drv/ohci/ohci_regs.h

@@ -39 +39 @@
 typedef struct ohci_regs
 {
-        volatile uint32_t revision;
+        const volatile uint32_t revision;
         volatile uint32_t control;
+#define C_CSBR_MASK (0x3)
+#define C_CSBR_SHIFT (0)
+#define C_PLE (1 << 2)
+#define C_IE (1 << 3)
+#define C_CLE (1 << 4)
+#define C_BLE (1 << 5)
+
+#define C_HCFS_MASK (0x3)
+#define C_HCFS_SHIFT (6)
+#define C_HCFS_RESET (0x0)
+#define C_HCFS_OPERATIONAL (0x1)
+#define C_HCFS_RESUME (0x2)
+#define C_HCFS_SUSPEND (0x3)
+
+#define C_IR (1 << 8)
+#define C_RWC (1 << 9)
+#define C_RWE (1 << 10)
+
         volatile uint32_t command_status;
+#define CS_HCR (1 << 0)
+#define CS_CLF (1 << 1)
+#define CS_BLF (1 << 2)
+#define CS_OCR (1 << 3)
+#define CS_SOC_MASK (0x3)
+#define CS_SOC_SHIFT (16)
+
         volatile uint32_t interrupt_status;
 #define IS_SO (1 << 0)
@@ -51 +76 @@
 #define IS_RHSC (1 << 6)
 #define IS_OC (1 << 30)
+
         volatile uint32_t interupt_enable;
 #define IE_SO   (1 << 0)

uspace/drv/ohci/root_hub.c

@@ -252 +252 @@
 
 
-        usb_log_info("OHCI root hub with %d ports.\n", regs->rh_desc_a & 0xff);
+        usb_log_info("OHCI root hub with %d ports.\n", instance->port_count);
 
         //start generic usb hub driver