Changeset d57122c in mainline for uspace/drv/bus/usb/ohci/hc.c

Timestamp:

2012-02-12T18:41:44Z (12 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

bd8c6537

Parents:

a996ae31

Message:

UHCI and OHCI HC's now define and use proper IRQ PIO range.

File:

• uspace/drv/bus/usb/ohci/hc.c (modified) (4 diffs)

uspace/drv/bus/usb/ohci/hc.c

@@ -47 +47 @@
     (I_SO | I_WDH | I_UE | I_RHSC)
 
-static const irq_cmd_t ohci_irq_commands[] =
-{
-        { .cmd = CMD_PIO_READ_32, .dstarg = 1, .addr = NULL /*filled later*/ },
+static const irq_pio_range_t ohci_pio_ranges[] = {
+        {
+                .base = 0,      /* filled later */
+                .size = sizeof(ohci_regs_t)
+        }
+};
+
+static const irq_cmd_t ohci_irq_commands[] = {
+        { .cmd = CMD_PIO_READ_32, .dstarg = 1, .addr = NULL /* filled later */ },
         { .cmd = CMD_BTEST, .srcarg = 1, .dstarg = 2, .value = OHCI_USED_INTERRUPTS },
         { .cmd = CMD_PREDICATE, .srcarg = 2, .value = 2 },
-        { .cmd = CMD_PIO_WRITE_A_32, .srcarg = 1, .addr = NULL /*filled later*/ },
+        { .cmd = CMD_PIO_WRITE_A_32, .srcarg = 1, .addr = NULL /* filled later */ },
         { .cmd = CMD_ACCEPT },
 };
@@ -63 +69 @@
 static int hc_schedule(hcd_t *hcd, usb_transfer_batch_t *batch);
 /*----------------------------------------------------------------------------*/
+/** Get number of PIO ranges used in IRQ code.
+ * @return Number of ranges.
+ */
+size_t hc_irq_pio_range_count(void)
+{
+        return sizeof(ohci_pio_ranges) / sizeof(irq_pio_range_t);
+}
+/*----------------------------------------------------------------------------*/
+/*----------------------------------------------------------------------------*/
 /** Get number of commands used in IRQ code.
  * @return Number of commands.
@@ -71 +86 @@
 }
 /*----------------------------------------------------------------------------*/
-/** Generate IRQ code commands.
- * @param[out] cmds Place to store the commands.
- * @param[in] cmd_size Size of the place (bytes).
+/** Generate IRQ code.
+ * @param[out] ranges PIO ranges buffer.
+ * @param[in] ranges_size Size of the ranges buffer (bytes).
+ * @param[out] cmds Commands buffer.
+ * @param[in] cmds_size Size of the commands buffer (bytes).
  * @param[in] regs Physical address of device's registers.
  * @param[in] reg_size Size of the register area (bytes).
@@ -79 +96 @@
  * @return Error code.
  */
-int hc_get_irq_commands(
-    irq_cmd_t cmds[], size_t cmd_size, uintptr_t regs, size_t reg_size)
-{
-        if (cmd_size < sizeof(ohci_irq_commands)
-            || reg_size < sizeof(ohci_regs_t))
+int
+hc_get_irq_code(irq_pio_range_t ranges[], size_t ranges_size, irq_cmd_t cmds[],
+    size_t cmds_size, uintptr_t regs, size_t reg_size)
+{
+        if ((ranges_size < sizeof(ohci_pio_ranges)) ||
+            (cmds_size < sizeof(ohci_irq_commands)) ||
+            (reg_size < sizeof(ohci_regs_t)))
                 return EOVERFLOW;
 
-        /* Create register mapping to use in IRQ handler.
-         * This mapping should be present in kernel only.
-         * Remove it from here when kernel knows how to create mappings
-         * and accepts physical addresses in IRQ code.
-         * TODO: remove */
-        ohci_regs_t *registers;
-        const int ret = pio_enable((void*)regs, reg_size, (void**)&registers);
-        if (ret != EOK)
-                return ret;
-
-        /* Some bogus access to force create mapping. DO NOT remove,
-         * unless whole virtual addresses in irq is replaced
-         * NOTE: Compiler won't remove this as ohci_regs_t members
-         * are declared volatile.
-         *
-         * Introducing CMD_MEM set of IRQ code commands broke
-         * assumption that IRQ code does not cause page faults.
-         * If this happens during idling (THREAD == NULL)
-         * it causes kernel panic.
-         */
-        registers->revision;
+        memcpy(ranges, ohci_pio_ranges, sizeof(ohci_pio_ranges));
+        ranges[0].base = regs;
 
         memcpy(cmds, ohci_irq_commands, sizeof(ohci_irq_commands));
-
-        void *address = (void*)&registers->interrupt_status;
-        cmds[0].addr = address;
-        cmds[3].addr = address;
+        ohci_regs_t *registers = (ohci_regs_t *) regs;
+        cmds[0].addr = (void *) &registers->interrupt_status;
+        cmds[3].addr = (void *) &registers->interrupt_status;
+
         return EOK;
 }