/***************************************************************************** * Copyright (c) 2013 IBM Corporation * All rights reserved. * This program and the accompanying materials * are made available under the terms of the BSD License * which accompanies this distribution, and is available at * http://www.opensource.org/licenses/bsd-license.php * * Contributors: * IBM Corporation - initial implementation *****************************************************************************/ #include #include #include "usb.h" #include "usb-core.h" #include "usb-ohci.h" #undef OHCI_DEBUG //#define OHCI_DEBUG #ifdef OHCI_DEBUG #define dprintf(_x ...) do { printf(_x); } while(0) #else #define dprintf(_x ...) #endif #undef OHCI_DEBUG_PACKET //#define OHCI_DEBUG_PACKET #ifdef OHCI_DEBUG_PACKET #define dpprintf(_x ...) do { printf(_x); } while(0) #else #define dpprintf(_x ...) #endif /* * Dump OHCI register * * @param - ohci_hcd * @return - */ static void ohci_dump_regs(struct ohci_regs *regs) { dprintf("\n - HcRevision %08X", read_reg32(®s->rev)); dprintf(" - HcControl %08X", read_reg32(®s->control)); dprintf("\n - HcCommandStatus %08X", read_reg32(®s->cmd_status)); dprintf(" - HcInterruptStatus %08X", read_reg32(®s->intr_status)); dprintf("\n - HcInterruptEnable %08X", read_reg32(®s->intr_enable)); dprintf(" - HcInterruptDisable %08X", read_reg32(®s->intr_disable)); dprintf("\n - HcHCCA %08X", read_reg32(®s->hcca)); dprintf(" - HcPeriodCurrentED %08X", read_reg32(®s->period_curr_ed)); dprintf("\n - HcControlHeadED %08X", read_reg32(®s->cntl_head_ed)); dprintf(" - HcControlCurrentED %08X", read_reg32(®s->cntl_curr_ed)); dprintf("\n - HcBulkHeadED %08X", read_reg32(®s->bulk_head_ed)); dprintf(" - HcBulkCurrentED %08X", read_reg32(®s->bulk_curr_ed)); dprintf("\n - HcDoneHead %08X", read_reg32(®s->done_head)); dprintf(" - HcFmInterval %08X", read_reg32(®s->fm_interval)); dprintf("\n - HcFmRemaining %08X", read_reg32(®s->fm_remaining)); dprintf(" - HcFmNumber %08X", read_reg32(®s->fm_num)); dprintf("\n - HcPeriodicStart %08X", read_reg32(®s->period_start)); dprintf(" - HcLSThreshold %08X", read_reg32(®s->ls_threshold)); dprintf("\n - HcRhDescriptorA %08X", read_reg32(®s->rh_desc_a)); dprintf(" - HcRhDescriptorB %08X", read_reg32(®s->rh_desc_b)); dprintf("\n - HcRhStatus %08X", read_reg32(®s->rh_status)); dprintf("\n"); } /* * OHCI Spec 5.1.1 * OHCI Spec 7.4 Root Hub Partition */ static int ohci_hcd_reset(struct ohci_regs *regs) { uint32_t time; /* USBRESET - 1sec */ write_reg32(®s->control, 0); SLOF_msleep(100); write_reg32(®s->intr_disable, ~0); write_reg32(®s->cmd_status, OHCI_CMD_STATUS_HCR); mb(); time = 30; /* wait for not more than 30usec */ while ((read_reg32(®s->cmd_status) & OHCI_CMD_STATUS_HCR) != 0) { time--; if (!time) { printf(" ** HCD Reset failed..."); return -1; } SLOF_usleep(1); } return 0; } static int ohci_hcd_init(struct ohci_hcd *ohcd) { struct ohci_regs *regs; struct ohci_ed *ed; long ed_phys = 0; unsigned int i; uint32_t oldrwc; struct usb_dev *rhdev = NULL; struct usb_ep_descr ep; uint32_t reg; if (!ohcd) return -1; regs = ohcd->regs; rhdev = &ohcd->rhdev; dprintf("%s: HCCA memory %p\n", __func__, ohcd->hcca); dprintf("%s: OHCI Regs %p\n", __func__, regs); rhdev->hcidev = ohcd->hcidev; ep.bmAttributes = USB_EP_TYPE_INTR; ep.wMaxPacketSize = 8; rhdev->intr = usb_get_pipe(rhdev, &ep, NULL, 0); if (!rhdev->intr) { printf("usb-ohci: oops could not allocate intr_pipe\n"); return -1; } /* * OHCI Spec 4.4: Host Controller Communications Area */ ed = ohci_pipe_get_ed(rhdev->intr); ed_phys = ohci_pipe_get_ed_phys(rhdev->intr); memset(ohcd->hcca, 0, HCCA_SIZE); memset(ed, 0, sizeof(struct ohci_ed)); ed->attr = cpu_to_le32(EDA_SKIP); for (i = 0; i < HCCA_INTR_NUM; i++) ohcd->hcca->intr_table[i] = cpu_to_le32(ed_phys); write_reg32(®s->hcca, ohcd->hcca_phys); write_reg32(®s->cntl_head_ed, 0); write_reg32(®s->bulk_head_ed, 0); /* OHCI Spec 7.1.2 HcControl Register */ oldrwc = read_reg32(®s->control) & OHCI_CTRL_RWC; write_reg32(®s->control, (OHCI_CTRL_CBSR | OHCI_CTRL_CLE | OHCI_CTRL_BLE | OHCI_CTRL_PLE | OHCI_USB_OPER | oldrwc)); SLOF_msleep(100); /* * For JS20/21 need to rewrite it after setting it to * operational state */ write_reg32(®s->fm_interval, FRAME_INTERVAL); write_reg32(®s->period_start, PERIODIC_START); reg = read_reg32(®s->rh_desc_a); reg &= ~( RHDA_PSM_INDIVIDUAL | RHDA_OCPM_PERPORT ); reg |= RHDA_NPS_ENABLE; write_reg32(®s->rh_desc_a, reg); write_reg32(®s->rh_desc_b, 0); mb(); SLOF_msleep(100); ohci_dump_regs(regs); return 0; } /* * OHCI Spec 7.4 Root Hub Partition */ static void ohci_hub_check_ports(struct ohci_hcd *ohcd) { struct ohci_regs *regs; struct usb_dev *dev; unsigned int ports, i, port_status, port_clear = 0; regs = ohcd->regs; ports = read_reg32(®s->rh_desc_a) & RHDA_NDP; write_reg32(®s->rh_status, RH_STATUS_LPSC); SLOF_msleep(100); dprintf("usb-ohci: ports connected %d\n", ports); for (i = 0; i < ports; i++) { dprintf("usb-ohci: ports scanning %d\n", i); port_status = read_reg32(®s->rh_ps[i]); if (port_status & RH_PS_CSC) { if (port_status & RH_PS_CCS) { write_reg32(®s->rh_ps[i], RH_PS_PRS); mb(); port_clear |= RH_PS_CSC; dprintf("Start enumerating device\n"); SLOF_msleep(100); } else printf("Start removing device\n"); } port_status = read_reg32(®s->rh_ps[i]); if (port_status & RH_PS_PRSC) { port_clear |= RH_PS_PRSC; dev = usb_devpool_get(); dprintf("usb-ohci: Device reset, setting up %p\n", dev); dev->hcidev = ohcd->hcidev; if (usb_setup_new_device(dev, i)) usb_slof_populate_new_device(dev); else printf("usb-ohci: unable to setup device on port %d\n", i); } if (port_status & RH_PS_PESC) { port_clear |= RH_PS_PESC; if (port_status & RH_PS_PES) dprintf("enabled\n"); else dprintf("disabled\n"); } if (port_status & RH_PS_PSSC) { port_clear |= RH_PS_PESC; dprintf("suspended\n"); } port_clear &= 0xFFFF0000; if (port_clear) write_reg32(®s->rh_ps[i], port_clear); } } static inline struct ohci_ed *ohci_pipe_get_ed(struct usb_pipe *pipe) { struct ohci_pipe *opipe; opipe = container_of(pipe, struct ohci_pipe, pipe); dpprintf("%s: ed is %p\n", __func__, &opipe->ed); return &opipe->ed; } static inline long ohci_pipe_get_ed_phys(struct usb_pipe *pipe) { struct ohci_pipe *opipe; opipe = container_of(pipe, struct ohci_pipe, pipe); dpprintf("%s: ed_phys is %x\n", __func__, opipe->ed_phys); return opipe->ed_phys; } static inline struct ohci_pipe *ohci_pipe_get_opipe(struct usb_pipe *pipe) { struct ohci_pipe *opipe; opipe = container_of(pipe, struct ohci_pipe, pipe); dpprintf("%s: opipe is %p\n", __func__, opipe); return opipe; } static int ohci_alloc_pipe_pool(struct ohci_hcd *ohcd) { struct ohci_pipe *opipe, *curr, *prev; long opipe_phys = 0; unsigned int i, count; #ifdef OHCI_DEBUG_PACKET struct usb_pipe *pipe; #endif dprintf("usb-ohci: %s enter\n", __func__); count = OHCI_PIPE_POOL_SIZE/sizeof(*opipe); ohcd->pool = opipe = SLOF_dma_alloc(OHCI_PIPE_POOL_SIZE); if (!opipe) return false; ohcd->pool_phys = opipe_phys = SLOF_dma_map_in(opipe, OHCI_PIPE_POOL_SIZE, true); dprintf("usb-ohci: %s opipe %p, opipe_phys %lx size %ld count %d\n", __func__, opipe, opipe_phys, sizeof(*opipe), count); /* Although an array, link them*/ for (i = 0, curr = opipe, prev = NULL; i < count; i++, curr++) { if (prev) prev->pipe.next = &curr->pipe; curr->pipe.next = NULL; prev = curr; if (((uint64_t)&curr->ed) % 16) printf("usb-ohci: Warning ED not aligned to 16byte boundary"); curr->ed_phys = opipe_phys + (curr - opipe) * sizeof(*curr) + offset_of(struct ohci_pipe, ed); } if (!ohcd->freelist) ohcd->freelist = &opipe->pipe; else ohcd->end->next = &opipe->pipe; ohcd->end = &prev->pipe; #ifdef OHCI_DEBUG_PACKET for (i = 0, pipe = ohcd->freelist; pipe; pipe = pipe->next) dprintf("usb-ohci: %d: pipe cur %p ed %p ed_phys %x\n", i++, pipe, ohci_pipe_get_ed(pipe), ohci_pipe_get_ed_phys(pipe)); #endif dprintf("usb-ohci: %s exit\n", __func__); return true; } static void ohci_init(struct usb_hcd_dev *hcidev) { struct ohci_hcd *ohcd; printf(" OHCI: initializing\n"); dprintf("%s: device base address %p\n", __func__, hcidev->base); ohcd = SLOF_alloc_mem(sizeof(struct ohci_hcd)); if (!ohcd) { printf("usb-ohci: Unable to allocate memory\n"); goto out; } hcidev->nextaddr = 1; hcidev->priv = ohcd; memset(ohcd, 0, sizeof(*ohcd)); ohcd->hcidev = hcidev; ohcd->freelist = NULL; ohcd->end = NULL; ohcd->regs = (struct ohci_regs *)(hcidev->base); ohcd->hcca = SLOF_dma_alloc(sizeof(struct ohci_hcca)); if (!ohcd->hcca || PTR_U32(ohcd->hcca) & HCCA_ALIGN) { printf("usb-ohci: Unable to allocate/unaligned HCCA memory %p\n", ohcd->hcca); goto out_free_hcd; } ohcd->hcca_phys = SLOF_dma_map_in(ohcd->hcca, sizeof(struct ohci_hcca), true); dprintf("usb-ohci: HCCA memory %p HCCA-dev memory %08lx\n", ohcd->hcca, ohcd->hcca_phys); ohci_hcd_reset(ohcd->regs); ohci_hcd_init(ohcd); ohci_hub_check_ports(ohcd); return; out_free_hcd: SLOF_dma_free(ohcd->hcca, sizeof(struct ohci_hcca)); SLOF_free_mem(ohcd, sizeof(struct ohci_hcd)); out: return; } static void ohci_exit(struct usb_hcd_dev *hcidev) { struct ohci_hcd *ohcd = NULL; dprintf("%s: enter \n", __func__); if (!hcidev && !hcidev->priv) return; ohcd = hcidev->priv; write_reg32(&ohcd->regs->control, (OHCI_CTRL_CBSR | OHCI_USB_SUSPEND)); SLOF_msleep(20); write_reg32(&ohcd->regs->hcca, cpu_to_le32(0)); if (ohcd->pool) { SLOF_dma_map_out(ohcd->pool_phys, ohcd->pool, OHCI_PIPE_POOL_SIZE); SLOF_dma_free(ohcd->pool, OHCI_PIPE_POOL_SIZE); } if (ohcd->hcca) { SLOF_dma_map_out(ohcd->hcca_phys, ohcd->hcca, sizeof(struct ohci_hcca)); SLOF_dma_free(ohcd->hcca, sizeof(struct ohci_hcca)); } SLOF_free_mem(ohcd, sizeof(struct ohci_hcd)); return; } static void ohci_detect(void) { } static void ohci_disconnect(void) { } #define OHCI_CTRL_TDS 3 static void ohci_fill_td(struct ohci_td *td, long next, long req, size_t size, unsigned int attr) { if (size && req) { td->cbp = cpu_to_le32(req); td->be = cpu_to_le32(req + size - 1); } else { td->cbp = 0; td->be = 0; } td->attr = cpu_to_le32(attr); td->next_td = cpu_to_le32(next); dpprintf("%s: cbp %08X attr %08X next_td %08X be %08X\n", __func__, le32_to_cpu(td->cbp), le32_to_cpu(td->attr), le32_to_cpu(td->next_td), le32_to_cpu(td->be)); } static void ohci_fill_ed(struct ohci_ed *ed, long headp, long tailp, unsigned int attr, long next_ed) { ed->attr = cpu_to_le32(attr); ed->headp = cpu_to_le32(headp) | (ed->headp & ~EDA_HEADP_MASK_LE); ed->tailp = cpu_to_le32(tailp); ed->next_ed = cpu_to_le32(next_ed); dpprintf("%s: headp %08X tailp %08X next_td %08X attr %08X\n", __func__, le32_to_cpu(ed->headp), le32_to_cpu(ed->tailp), le32_to_cpu(ed->next_ed), le32_to_cpu(ed->attr)); } static long ohci_get_td_phys(struct ohci_td *curr, struct ohci_td *start, long td_phys) { dpprintf("position %d\n", curr - start); return td_phys + (curr - start) * sizeof(*start); } static long ohci_get_td_virt(struct ohci_td *curr, struct ohci_td *start, long td_virt, long total_count) { dpprintf("position %d\n", curr - start); if ( (curr - start) >= total_count) { /* busted position, should ignore this */ return 0; } return td_virt + (curr - start) * sizeof(*start); } /* OHCI Spec: 4.4.2.3 HccaDoneHead*/ static int ohci_process_done_head(struct ohci_hcd *ohcd, struct ohci_td *td_start, long __td_start_phys, long total_count) { struct ohci_hcca *hcca; struct ohci_td *td_phys = NULL, *td_start_phys; struct ohci_td *td, *prev_td = NULL; uint32_t reg = 0, time = 0; int ret = true; long count; count = total_count; td_start_phys = (struct ohci_td *) __td_start_phys; hcca = ohcd->hcca; time = SLOF_GetTimer() + USB_TIMEOUT; dpprintf("Claiming %ld\n", count); again: mb(); /* Check if there is an interrupt */ reg = read_reg32(&ohcd->regs->intr_status); while(!(reg & OHCI_INTR_STATUS_WD)) { if (time < SLOF_GetTimer()) { printf("Timed out waiting for interrupt %x\n", reg); return false; } mb(); reg = read_reg32(&ohcd->regs->intr_status); } /* Interrupt is there, read from done_head pointer */ td_phys = (struct ohci_td *)(uint64_t) le32_to_cpu(hcca->done_head); if (!td_phys) { dprintf("Again td_phys null\n"); goto again; } hcca->done_head = 0; mb(); while (td_phys && (count > 0)) { td = (struct ohci_td *)(uint64_t) ohci_get_td_virt(td_phys, td_start_phys, PTR_U32(td_start), total_count); if (!td) { printf("USB: Error TD null %p\n", td_phys); break; } count--; dprintf("Claimed %p(%p) td_start %p count %ld\n", td, td_phys, td_start_phys, count); dpprintf("%s: cbp %08X attr %08X next_td %08X be %08X\n", __func__, le32_to_cpu(td->cbp), le32_to_cpu(td->attr), le32_to_cpu(td->next_td), le32_to_cpu(td->be)); mb(); reg = (le32_to_cpu(td->attr) & TDA_CC) >> 28; if (reg) { dprintf("%s: cbp %08X attr %08X next_td %08X be %08X\n", __func__, le32_to_cpu(td->cbp), le32_to_cpu(td->attr), le32_to_cpu(td->next_td), le32_to_cpu(td->be)); printf("USB: Error %s %p\n", tda_cc_error[reg], td); if (reg > 3) /* Return negative error code */ ret = reg * -1; } prev_td = td; td_phys = (struct ohci_td *)(uint64_t) le32_to_cpu(td->next_td); prev_td->attr |= cpu_to_le32(TDA_DONE); prev_td->next_td = 0; mb(); } /* clear the WD interrupt status */ write_reg32(&ohcd->regs->intr_status, OHCI_INTR_STATUS_WD); mb(); read_reg32(&ohcd->regs->intr_status); if (count > 0) { dpprintf("Pending count %d\n", count); goto again; } dprintf("TD claims done\n"); return ret; } /* * OHCI Spec: * 4.2 Endpoint Descriptor * 4.3.1 General Transfer Descriptor * 5.2.8 Transfer Descriptor Queues */ static int ohci_send_ctrl(struct usb_pipe *pipe, struct usb_dev_req *req, void *data) { struct ohci_ed *ed; struct ohci_td *tds, *td, *td_phys; struct ohci_regs *regs; struct ohci_hcd *ohcd; uint32_t datalen; uint32_t dir, attr = 0; uint32_t time; int ret = true, i; long req_phys = 0, data_phys = 0, td_next = 0, td_count = 0; unsigned char *dbuf; datalen = le16_to_cpu(req->wLength); dir = (req->bmRequestType & REQT_DIR_IN) ? 1 : 0; dprintf("usb-ohci: %s len %d DIR_IN %d\n", __func__, datalen, dir); tds = td = (struct ohci_td *) SLOF_dma_alloc(sizeof(*td) * OHCI_CTRL_TDS); td_phys = (struct ohci_td *) SLOF_dma_map_in(td, sizeof(*td) * OHCI_CTRL_TDS, true); memset(td, 0, sizeof(*td) * OHCI_CTRL_TDS); req_phys = SLOF_dma_map_in(req, sizeof(struct usb_dev_req), true); attr = TDA_DP_SETUP | TDA_CC | TDA_TOGGLE_DATA0; td_next = ohci_get_td_phys(td + 1, tds, PTR_U32(td_phys)); ohci_fill_td(td, td_next, req_phys, sizeof(*req), attr); td++; td_count++; if (datalen) { data_phys = SLOF_dma_map_in(data, datalen, true); attr = 0; attr = (dir ? TDA_DP_IN : TDA_DP_OUT) | TDA_TOGGLE_DATA1 | TDA_CC; td_next = ohci_get_td_phys(td + 1, tds, PTR_U32(td_phys)); ohci_fill_td(td, td_next, data_phys, datalen, attr); td++; td_count++; } attr = 0; attr = (dir ? TDA_DP_OUT : TDA_DP_IN) | TDA_CC | TDA_TOGGLE_DATA1; td_next = ohci_get_td_phys(td + 1, tds, PTR_U32(td_phys)); ohci_fill_td(td, 0, 0, 0, attr); td_count++; ed = ohci_pipe_get_ed(pipe); attr = 0; attr = EDA_FADDR(pipe->dev->addr) | EDA_MPS(pipe->mps) | EDA_SKIP; ohci_fill_ed(ed, PTR_U32(td_phys), td_next, attr, 0); ed->tailp = 0; /* HACK */ dprintf("usb-ohci: %s - td_start %p td_end %lx req %lx\n", __func__, td_phys, td_next, req_phys); mb(); ed->attr &= cpu_to_le32(~EDA_SKIP); ohcd = pipe->dev->hcidev->priv; regs = ohcd->regs; write_reg32(®s->cntl_head_ed, ohci_pipe_get_ed_phys(pipe)); mb(); write_reg32(®s->cmd_status, OHCI_CMD_STATUS_CLF); time = SLOF_GetTimer() + USB_TIMEOUT; while ((time > SLOF_GetTimer()) && ((ed->headp & EDA_HEADP_MASK_LE) != ed->tailp)) cpu_relax(); if ((ed->headp & EDA_HEADP_MASK_LE) == ed->tailp) { dprintf("%s: packet sent\n", __func__); #ifdef OHCI_DEBUG_PACKET dpprintf("Request: "); dbuf = (unsigned char *)req; for(i = 0; i < 8; i++) printf("%02X ", dbuf[i]); dpprintf("\n"); if (datalen) { dbuf = (unsigned char *)data; dpprintf("Reply: "); for(i = 0; i < datalen; i++) printf("%02X ", dbuf[i]); dpprintf("\n"); } #endif } else { printf("%s: timed out - failed\n", __func__); dpprintf("%s: headp %08X tailp %08X next_td %08X attr %08X\n", __func__, le32_to_cpu(ed->headp), le32_to_cpu(ed->tailp), le32_to_cpu(ed->next_ed), le32_to_cpu(ed->attr)); printf("Request: "); dbuf = (unsigned char *)req; for(i = 0; i < 8; i++) printf("%02X ", dbuf[i]); printf("\n"); } ret = ohci_process_done_head(ohcd, tds, (long)td_phys, td_count); mb(); ed->attr |= cpu_to_le32(EDA_SKIP); mb(); write_reg32(®s->cntl_head_ed, 0); write_reg32(®s->cntl_curr_ed, 0); SLOF_dma_map_out(req_phys, req, sizeof(struct usb_dev_req)); if (datalen) SLOF_dma_map_out(data_phys, data, datalen); SLOF_dma_map_out(PTR_U32(td_phys), tds, sizeof(*td) * OHCI_CTRL_TDS); SLOF_dma_free(tds, sizeof(*td) * OHCI_CTRL_TDS); return (ret > 0) ? true : false; } static int ohci_transfer_bulk(struct usb_pipe *pipe, void *td_ptr, void *td_phys_ptr, void *data_phys, int datalen) { struct ohci_ed *ed; struct ohci_td *td, *tds; struct ohci_regs *regs; struct ohci_hcd *ohcd; long td_phys = 0, td_next, ed_phys, ptr, td_count = 0; uint32_t dir, attr = 0, count; size_t len, packet_len; uint32_t time; int ret = true; if (pipe->type != USB_EP_TYPE_BULK) { printf("usb-ohci: Not a bulk pipe.\n"); ret = false; goto end; } dir = (pipe->dir == USB_PIPE_OUT) ? 0 : 1; count = datalen / OHCI_MAX_BULK_SIZE; if (count > OHCI_MAX_TDS) { printf("usb-ohci: buffer size not supported - %d\n", datalen); ret = false; goto end; } td = tds = (struct ohci_td *) td_ptr; td_phys = (long)td_phys_ptr; dprintf("usb-ohci: %s pipe %p data_phys %p len %d DIR_IN %d td %p td_phys %lx\n", __func__, pipe, data_phys, datalen, dir, td, td_phys); if (!tds) { printf("%s: tds NULL recieved\n", __func__); ret = false; goto end; } memset(td, 0, sizeof(*td) * OHCI_MAX_TDS); len = datalen; ptr = (long)data_phys; attr = 0; attr = (dir ? TDA_DP_IN : TDA_DP_OUT) | TDA_CC | TDA_ROUNDING; while (len) { packet_len = (OHCI_MAX_BULK_SIZE < len)? OHCI_MAX_BULK_SIZE : len; td_next = ohci_get_td_phys((td + 1), tds, td_phys); ohci_fill_td(td, td_next, ptr, packet_len, attr); ptr = ptr + packet_len; len = len - packet_len; td++; td_count++; } ed = ohci_pipe_get_ed(pipe); attr = 0; dir = pipe->dir ? EDA_DIR_IN : EDA_DIR_OUT; attr = dir | EDA_FADDR(pipe->dev->addr) | EDA_MPS(pipe->mps) | EDA_SKIP | pipe->dev->speed | EDA_EP(pipe->epno); td_next = ohci_get_td_phys(td, tds, td_phys); ohci_fill_ed(ed, td_phys, td_next, attr, 0); dprintf("usb-ohci: %s - tds %lx td %lx\n", __func__, td_phys, td_next); mb(); ed->attr &= cpu_to_le32(~EDA_SKIP); ohcd = pipe->dev->hcidev->priv; regs = ohcd->regs; ed_phys = ohci_pipe_get_ed_phys(pipe); write_reg32(®s->bulk_head_ed, ed_phys); mb(); write_reg32(®s->cmd_status, 0x4); time = SLOF_GetTimer() + USB_TIMEOUT; while ((time > SLOF_GetTimer()) && ((ed->headp & EDA_HEADP_MASK_LE) != ed->tailp)) cpu_relax(); if ((ed->headp & EDA_HEADP_MASK_LE) == ed->tailp) dprintf("%s: packet sent\n", __func__); else { dpprintf("%s: headp %08X tailp %08X next_td %08X attr %08X\n", __func__, le32_to_cpu(ed->headp), le32_to_cpu(ed->tailp), le32_to_cpu(ed->next_ed), le32_to_cpu(ed->attr)); } mb(); ret = ohci_process_done_head(ohcd, tds, td_phys, td_count); mb(); ed->attr |= cpu_to_le32(EDA_SKIP); mb(); write_reg32(®s->bulk_head_ed, 0); write_reg32(®s->bulk_curr_ed, 0); if (le32_to_cpu(ed->headp) & EDA_HEADP_HALTED) { printf("ED Halted\n"); printf("%s: headp %08X tailp %08X next_td %08X attr %08X\n", __func__, le32_to_cpu(ed->headp), le32_to_cpu(ed->tailp), le32_to_cpu(ed->next_ed), le32_to_cpu(ed->attr)); ed->headp &= ~cpu_to_le32(EDA_HEADP_HALTED); mb(); if (ret == USB_STALL) /* Call reset recovery */ usb_msc_resetrecovery(pipe->dev); } end: return (ret > 0) ? true : false; } /* Populate the hcca intr region with periodic intr */ static int ohci_get_pipe_intr(struct usb_pipe *pipe, struct ohci_hcd *ohcd, char *buf, size_t buflen) { struct ohci_hcca *hcca; struct ohci_pipe *opipe; struct ohci_ed *ed; struct usb_dev *dev; struct ohci_td *tds, *td; int32_t count = 0, i; uint8_t *ptr; uint16_t mps; long ed_phys, td_phys, td_next, buf_phys; if (!pipe || !ohcd) return false; hcca = ohcd->hcca; dev = pipe->dev; if (dev->class != DEV_HID_KEYB && dev->class != DEV_HUB) return false; opipe = ohci_pipe_get_opipe(pipe); ed = &(opipe->ed); ed_phys = opipe->ed_phys; mps = pipe->mps; ed->attr = cpu_to_le32(EDA_DIR_IN | EDA_FADDR(dev->addr) | dev->speed | EDA_MPS(pipe->mps) | EDA_SKIP | EDA_EP(pipe->epno)); dprintf("%s: pipe %p ed %p dev %p opipe %p\n", __func__, pipe, ed, dev, opipe); count = (buflen/mps) + 1; tds = td = SLOF_dma_alloc(sizeof(*td) * count); if (!tds) { printf("%s: alloc failed\n", __func__); return false; } td_phys = SLOF_dma_map_in(td, sizeof(*td) * count, false); memset(tds, 0, sizeof(*tds) * count); memset(buf, 0, buflen); buf_phys = SLOF_dma_map_in(buf, buflen, false); opipe->td = td; opipe->td_phys = td_phys; opipe->count = count; opipe->buf = buf; opipe->buflen = buflen; opipe->buf_phys = buf_phys; ptr = (uint8_t *)buf_phys; for (i = 0; i < count - 1; i++, ptr += mps) { td = &tds[i]; td_next = ohci_get_td_phys(td + 1, &tds[0], td_phys); td->cbp = cpu_to_le32(PTR_U32(ptr)); td->attr = cpu_to_le32(TDA_DP_IN | TDA_ROUNDING | TDA_CC); td->next_td = cpu_to_le32(td_next); td->be = cpu_to_le32(PTR_U32(ptr) + mps - 1); dprintf("td %p td++ %x ptr %p be %x\n", td, le32_to_cpu(td->next_td), ptr, (PTR_U32(ptr) + mps - 1)); } td->next_td = 0; td_next = ohci_get_td_phys(td, &tds[0], td_phys); ed->headp = cpu_to_le32(td_phys); ed->tailp = cpu_to_le32(td_next); dprintf("%s: head %08X tail %08X, count %d, mps %d\n", __func__, le32_to_cpu(ed->headp), le32_to_cpu(ed->tailp), count, mps); ed->next_ed = 0; switch (dev->class) { case DEV_HID_KEYB: dprintf("%s: Keyboard class %d\n", __func__, dev->class); hcca->intr_table[0] = cpu_to_le32(ed_phys); hcca->intr_table[8] = cpu_to_le32(ed_phys); hcca->intr_table[16] = cpu_to_le32(ed_phys); hcca->intr_table[24] = cpu_to_le32(ed_phys); ed->attr &= cpu_to_le32(~EDA_SKIP); break; case DEV_HUB: dprintf("%s: HUB class %x\n", __func__, dev->class); hcca->intr_table[1] = cpu_to_le32(ed_phys); ed->attr &= cpu_to_le32(~EDA_SKIP); break; default: dprintf("%s: unhandled class %d\n", __func__, dev->class); } return true; } static int ohci_put_pipe_intr(struct usb_pipe *pipe, struct ohci_hcd *ohcd) { struct ohci_hcca *hcca; struct ohci_pipe *opipe; struct ohci_ed *ed; struct usb_dev *dev; struct ohci_td *td; long ed_phys; if (!pipe || !ohcd) return false; hcca = ohcd->hcca; dev = pipe->dev; if (dev->class != DEV_HID_KEYB && dev->class != DEV_HUB) return false; opipe = ohci_pipe_get_opipe(pipe); ed = &(opipe->ed); ed_phys = opipe->ed_phys; dprintf("%s: td %p td_phys %08lx buf %p buf_phys %08lx\n", __func__, opipe->td, opipe->td_phys, opipe->buf, opipe->buf_phys); ed->attr |= cpu_to_le32(EDA_SKIP); mb(); ed->headp = 0; ed->tailp = 0; ed->next_ed = 0; SLOF_dma_map_out(opipe->buf_phys, opipe->buf, opipe->buflen); SLOF_dma_map_out(opipe->td_phys, opipe->td, sizeof(*td) * opipe->count); SLOF_dma_free(opipe->td, sizeof(*td) * opipe->count); switch (dev->class) { case DEV_HID_KEYB: dprintf("%s: Keyboard class %d\n", __func__, dev->class); hcca->intr_table[0] = cpu_to_le32(ed_phys); hcca->intr_table[8] = cpu_to_le32(ed_phys); hcca->intr_table[16] = cpu_to_le32(ed_phys); hcca->intr_table[24] = cpu_to_le32(ed_phys); break; case DEV_HUB: dprintf("%s: HUB class %d\n", __func__, dev->class); hcca->intr_table[1] = cpu_to_le32(ed_phys); break; default: dprintf("%s: unhandled class %d\n", __func__, dev->class); } return true; } static int ohci_init_bulk_ed(struct usb_dev *dev, struct usb_pipe *pipe) { struct ohci_pipe *opipe; struct ohci_ed *ed; uint32_t dir; if (!pipe || !dev) return false; opipe = ohci_pipe_get_opipe(pipe); ed = &(opipe->ed); dir = pipe->dir ? EDA_DIR_IN : EDA_DIR_OUT; ed->attr = cpu_to_le32(dir | EDA_FADDR(dev->addr) | dev->speed | EDA_MPS(pipe->mps) | EDA_SKIP | EDA_EP(pipe->epno)); dprintf("%s: pipe %p attr %x\n", __func__, pipe, le32_to_cpu(ed->attr)); return true; } static struct usb_pipe *ohci_get_pipe(struct usb_dev *dev, struct usb_ep_descr *ep, char *buf, size_t buflen) { struct ohci_hcd *ohcd; struct usb_pipe *new = NULL; dprintf("usb-ohci: %s enter %p\n", __func__, dev); if (!dev) return NULL; ohcd = (struct ohci_hcd *)dev->hcidev->priv; if (!ohcd->freelist) { dprintf("usb-ohci: %s allocating pool\n", __func__); if (!ohci_alloc_pipe_pool(ohcd)) return NULL; } new = ohcd->freelist; ohcd->freelist = ohcd->freelist->next; if (!ohcd->freelist) ohcd->end = NULL; memset(new, 0, sizeof(*new)); new->dev = dev; new->next = NULL; new->type = ep->bmAttributes & USB_EP_TYPE_MASK; new->speed = dev->speed; new->mps = le16_to_cpu(ep->wMaxPacketSize); new->epno = ep->bEndpointAddress & 0xF; new->dir = ep->bEndpointAddress & 0x80; if (new->type == USB_EP_TYPE_INTR) if (!ohci_get_pipe_intr(new, ohcd, buf, buflen)) dprintf("usb-ohci: %s alloc_intr failed %p\n", __func__, new); if (new->type == USB_EP_TYPE_BULK) ohci_init_bulk_ed(dev, new); dprintf("usb-ohci: %s exit %p\n", __func__, new); return new; } static void ohci_put_pipe(struct usb_pipe *pipe) { struct ohci_hcd *ohcd; dprintf("usb-ohci: %s enter - %p\n", __func__, pipe); if (!pipe || !pipe->dev) return; ohcd = pipe->dev->hcidev->priv; if (ohcd->end) ohcd->end->next = pipe; else ohcd->freelist = pipe; if (pipe->type == USB_EP_TYPE_INTR) if (!ohci_put_pipe_intr(pipe, ohcd)) dprintf("usb-ohci: %s alloc_intr failed %p\n", __func__, pipe); ohcd->end = pipe; pipe->next = NULL; pipe->dev = NULL; memset(pipe, 0, sizeof(*pipe)); dprintf("usb-ohci: %s exit\n", __func__); } static uint16_t ohci_get_last_frame(struct usb_dev *dev) { struct ohci_hcd *ohcd; struct ohci_regs *regs; ohcd = dev->hcidev->priv; regs = ohcd->regs; return read_reg32(®s->fm_num); } static int ohci_poll_intr(struct usb_pipe *pipe, uint8_t *data) { struct ohci_pipe *opipe; struct ohci_ed *ed; struct ohci_td *head, *tail, *curr, *next; struct ohci_td *head_phys, *tail_phys, *curr_phys; uint8_t *ptr = NULL; unsigned int i, pos; static uint16_t last_frame; long ptr_phys = 0; long td_next; if (!pipe || last_frame == ohci_get_last_frame(pipe->dev)) return 0; dprintf("%s: enter\n", __func__); last_frame = ohci_get_last_frame(pipe->dev); opipe = ohci_pipe_get_opipe(pipe); ed = &opipe->ed; head_phys = (struct ohci_td *)(long)(le32_to_cpu(ed->headp) & EDA_HEADP_MASK); tail_phys = (struct ohci_td *)(long)le32_to_cpu(ed->tailp); curr_phys = (struct ohci_td *) opipe->td_phys; pos = (tail_phys - curr_phys + 1) % (opipe->count - 1); dprintf("pos %d %ld -- %d\n", pos, (tail_phys - curr_phys + 1), opipe->count); curr = opipe->td + pos; head = opipe->td + (head_phys - (struct ohci_td *) opipe->td_phys); tail = opipe->td + (tail_phys - (struct ohci_td *) opipe->td_phys); /* dprintf("%08X %08X %08X %08X\n", opipe->td_phys, head_phys, tail_phys, curr_phys); dprintf("%08X %08X %08X %08X\n", opipe->td, head, tail, curr); */ if (curr != head) { ptr = (uint8_t *) ((long)opipe->buf + pipe->mps * pos); ptr_phys = opipe->buf_phys + pipe->mps * pos; if (le32_to_cpu(*(uint32_t *)ptr) != 0) { for (i = 0; i < 8; i++) data[i] = *(ptr + i); } next = curr + 1; if (next == (opipe->td + opipe->count - 1)) next = opipe->td; curr->attr = cpu_to_le32(TDA_DP_IN | TDA_ROUNDING | TDA_CC); curr->next_td = cpu_to_le32(0); curr->cbp = cpu_to_le32(PTR_U32(ptr_phys)); curr->be = cpu_to_le32(PTR_U32(ptr_phys + pipe->mps - 1)); td_next = ohci_get_td_phys(curr, opipe->td, opipe->td_phys); dprintf("Connecting %p to %p(phys %08lx) ptr %p, " "ptr_phys %08lx\n", tail, curr, td_next, ptr, ptr_phys); tail->next_td = cpu_to_le32(td_next); mb(); ed->tailp = cpu_to_le32(td_next); } else return 0; dprintf("%s: exit\n", __func__); return 1; } struct usb_hcd_ops ohci_ops = { .name = "ohci-hcd", .init = ohci_init, .exit = ohci_exit, .detect = ohci_detect, .disconnect = ohci_disconnect, .get_pipe = ohci_get_pipe, .put_pipe = ohci_put_pipe, .send_ctrl = ohci_send_ctrl, .transfer_bulk = ohci_transfer_bulk, .poll_intr = ohci_poll_intr, .usb_type = USB_OHCI, .next = NULL, }; void usb_ohci_register(void) { usb_hcd_register(&ohci_ops); }