diff options
Diffstat (limited to 'drivers/usb/host/ehci-sched.c')
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index d4a8ace49676..e682f2342ef8 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -479,109 +479,6 @@ static int disable_periodic (struct ehci_hcd *ehci) } /*-------------------------------------------------------------------------*/ -#ifdef CONFIG_CPU_FREQ - -static int safe_to_modify_i (struct ehci_hcd *ehci, struct ehci_qh *qh) -{ - int now; /* current (frame * 8) + uframe */ - int prev_start, next_start; /* uframes from/to split start */ - int start_uframe = ffs(le32_to_cpup (&qh->hw_info2) & QH_SMASK); - int end_uframe = fls((le32_to_cpup (&qh->hw_info2) & QH_CMASK) >> 8); - int split_duration = end_uframe - start_uframe; - - now = readl(&ehci->regs->frame_index) % (ehci->periodic_size << 3); - - next_start = ((1024 << 3) + (qh->start << 3) + start_uframe - now) - % (qh->period << 3); - prev_start = (qh->period << 3) - next_start; - - /* - * Make sure there will be at least one uframe when qh is safe. - */ - if ((qh->period << 3) <= (ehci->i_thresh + 2 + split_duration)) - /* never safe */ - return -EINVAL; - - /* - * Wait 1 uframe after transaction should have started, to make - * sure controller has time to write back overlay, so we can - * check QTD_STS_STS to see if transaction is in progress. - */ - if ((next_start > ehci->i_thresh) && (prev_start > 1)) - /* safe to set "i" bit if split isn't in progress */ - return (qh->hw_token & STATUS_BIT(ehci)) ? 0 : 1; - else - return 0; -} - -/* Set inactivate bit for all the split interrupt QHs. */ -static void qh_inactivate_split_intr_qhs (struct ehci_hcd *ehci) -{ - struct ehci_qh *qh; - int not_done, safe; - u32 inactivate = INACTIVATE_BIT(ehci); - u32 active = ACTIVE_BIT(ehci); - - do { - not_done = 0; - list_for_each_entry(qh, &ehci->split_intr_qhs, - split_intr_qhs) { - if (qh->hw_info1 & inactivate) - /* already off */ - continue; - /* - * To avoid setting "I" after the start split happens, - * don't set it if the QH might be cached in the - * controller. Some HCs (Broadcom/ServerWorks HT1000) - * will stop in the middle of a split transaction when - * the "I" bit is set. - */ - safe = safe_to_modify_i(ehci, qh); - if (safe == 0) { - not_done = 1; - } else if (safe > 0) { - qh->was_active = qh->hw_token & active; - qh->hw_info1 |= inactivate; - } - } - } while (not_done); - wmb(); -} - -static void qh_reactivate_split_intr_qhs (struct ehci_hcd *ehci) -{ - struct ehci_qh *qh; - u32 token; - int not_done, safe; - u32 inactivate = INACTIVATE_BIT(ehci); - u32 active = ACTIVE_BIT(ehci); - u32 halt = HALT_BIT(ehci); - - do { - not_done = 0; - list_for_each_entry(qh, &ehci->split_intr_qhs, split_intr_qhs) { - if (!(qh->hw_info1 & inactivate)) /* already on */ - continue; - /* - * Don't reactivate if cached, or controller might - * overwrite overlay after we modify it! - */ - safe = safe_to_modify_i(ehci, qh); - if (safe == 0) { - not_done = 1; - } else if (safe > 0) { - /* See EHCI 1.0 section 4.15.2.4. */ - token = qh->hw_token; - qh->hw_token = (token | halt) & ~active; - wmb(); - qh->hw_info1 &= ~inactivate; - wmb(); - qh->hw_token = (token & ~halt) | qh->was_active; - } - } - } while (not_done); -} -#endif /* periodic schedule slots have iso tds (normal or split) first, then a * sparse tree for active interrupt transfers. @@ -599,17 +496,6 @@ static int qh_link_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh) period, hc32_to_cpup(ehci, &qh->hw_info2) & (QH_CMASK | QH_SMASK), qh, qh->start, qh->usecs, qh->c_usecs); -#ifdef CONFIG_CPU_FREQ - /* - * If low/full speed interrupt QHs are inactive (because of - * cpufreq changing processor speeds), start QH with I flag set-- - * it will automatically be cleared when cpufreq is done. - */ - if (ehci->cpufreq_changing) - if (!(qh->hw_info1 & (cpu_to_le32(1 << 13)))) - qh->hw_info1 |= INACTIVATE_BIT(ehci); -#endif - /* high bandwidth, or otherwise every microframe */ if (period == 0) period = 1; @@ -658,12 +544,6 @@ static int qh_link_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh) ? ((qh->usecs + qh->c_usecs) / qh->period) : (qh->usecs * 8); -#ifdef CONFIG_CPU_FREQ - /* add qh to list of low/full speed interrupt QHs, if applicable */ - if (!(qh->hw_info1 & (cpu_to_le32(1 << 13)))) { - list_add(&qh->split_intr_qhs, &ehci->split_intr_qhs); - } -#endif /* maybe enable periodic schedule processing */ if (!ehci->periodic_sched++) return enable_periodic (ehci); @@ -683,13 +563,6 @@ static void qh_unlink_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh) // THEN // qh->hw_info1 |= __constant_cpu_to_hc32(1 << 7 /* "ignore" */); -#ifdef CONFIG_CPU_FREQ - /* remove qh from list of low/full speed interrupt QHs */ - if (!(qh->hw_info1 & (cpu_to_le32(1 << 13)))) { - list_del_init(&qh->split_intr_qhs); - } -#endif - /* high bandwidth, or otherwise part of every microframe */ if ((period = qh->period) == 0) period = 1; |