X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/17c7b6c3fdc48301e50d22cc6138ede16bd1be24..adde7768a2eab2950a7628319ec832c63a00ff03:/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c index 4e8877728..72a252530 100644 --- a/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c +++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c @@ -1,996 +1,845 @@ /* - * HCD driver for ADM5120 SoC + * ADM5120 HCD (Host Controller Driver) for USB * - * Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org) + * Copyright (C) 2007,2008 Gabor Juhos + * + * This file was derived from: drivers/usb/host/ohci-hcd.c + * (C) Copyright 1999 Roman Weissgaerber + * (C) Copyright 2000-2004 David Brownell + * + * [ Initialisation is based on Linus' ] + * [ uhci code and gregs ahcd fragments ] + * [ (C) Copyright 1999 Linus Torvalds ] + * [ (C) Copyright 1999 Gregory P. Smith] + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. * - * Based on the ADMtek 2.4 driver - * (C) Copyright 2003 Junius Chen - * Which again was based on the ohci and uhci drivers. */ #include +#include +#include +#include #include -#include -#include +#include +#include +#include #include #include +#include #include #include -#include +#include +#include +#include +#include +#include -#include #include #include #include +#include #include -#include #include "../core/hcd.h" +#include "../core/hub.h" -MODULE_DESCRIPTION("ADM5120 USB Host Controller Driver"); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)"); - -#define PFX "adm5120-hcd: " - -#define ADMHCD_REG_CONTROL 0x00 -#define ADMHCD_SW_RESET 0x00000008 /* Reset */ -#define ADMHCD_DMAA 0x00000004 /* DMA arbitration control */ -#define ADMHCD_SW_INTREQ 0x00000002 /* request software int */ -#define ADMHCD_HOST_EN 0x00000001 /* Host enable */ -#define ADMHCD_REG_INTSTATUS 0x04 -#define ADMHCD_INT_ACT 0x80000000 /* Interrupt active */ -#define ADMHCD_INT_FATAL 0x40000000 /* Fatal interrupt */ -#define ADMHCD_INT_SW 0x20000000 /* software interrupt */ -#define ADMHCD_INT_TD 0x00100000 /* TD completed */ -#define ADMHCD_FNO 0x00000800 /* Frame number overaflow */ -#define ADMHCD_SO 0x00000400 /* Scheduling overrun */ -#define ADMHCD_INSMI 0x00000200 /* Root hub status change */ -#define ADMHCD_BABI 0x00000100 /* Babble detected, host mode */ -#define ADMHCD_RESI 0x00000020 /* Resume detected */ -#define ADMHCD_SOFI 0x00000010 /* SOF transmitted/received, host mode */ -#define ADMHCD_REG_INTENABLE 0x08 -#define ADMHCD_INT_EN 0x80000000 /* Interrupt enable */ -#define ADMHCD_INTMASK 0x00000001 /* Interrupt mask */ -#define ADMHCD_REG_HOSTCONTROL 0x10 -#define ADMHCD_DMA_EN 0x00000004 /* USB host DMA enable */ -#define ADMHCD_STATE_MASK 0x00000003 -#define ADMHCD_STATE_RST 0x00000000 /* bus state reset */ -#define ADMHCD_STATE_RES 0x00000001 /* bus state resume */ -#define ADMHCD_STATE_OP 0x00000002 /* bus state operational */ -#define ADMHCD_STATE_SUS 0x00000003 /* bus state suspended */ -#define ADMHCD_REG_FMINTERVAL 0x18 -#define ADMHCD_REG_FMNUMBER 0x1c -#define ADMHCD_REG_LSTHRESH 0x70 -#define ADMHCD_REG_RHDESCR 0x74 -#define ADMHCD_CRWE 0x20000000 /* Clear wakeup enable */ -#define ADMHCD_DRWE 0x10000000 /* Device remote wakeup enable */ -#define ADMHCD_HW_OCIC 0x08000000 /* Over current indication change */ -#define ADMHCD_LPSC 0x04000000 /* Local power switch change */ -#define ADMHCD_OCI 0x02000000 /* Over current indication */ -#define ADMHCD_LPS 0x01000000 /* Local power switch/global power switch */ -#define ADMHCD_NOCP 0x00000800 /* No over current protect mode */ -#define ADMHCD_OPCM 0x00000400 /* Over current protect mode */ -#define ADMHCD_NPS 0x00000200 /* No Power Switch */ -#define ADMHCD_PSM 0x00000100 /* Power switch mode */ -#define ADMHCD_REG_PORTSTATUS0 0x78 -#define ADMHCD_CCS 0x00000001 /* current connect status */ -#define ADMHCD_PES 0x00000002 /* port enable status */ -#define ADMHCD_PSS 0x00000004 /* port suspend status */ -#define ADMHCD_POCI 0x00000008 /* port overcurrent indicator */ -#define ADMHCD_PRS 0x00000010 /* port reset status */ -#define ADMHCD_PPS 0x00000100 /* port power status */ -#define ADMHCD_LSDA 0x00000200 /* low speed device attached */ -#define ADMHCD_CSC 0x00010000 /* connect status change */ -#define ADMHCD_PESC 0x00020000 /* enable status change */ -#define ADMHCD_PSSC 0x00040000 /* suspend status change */ -#define ADMHCD_OCIC 0x00080000 /* overcurrent change*/ -#define ADMHCD_PRSC 0x00100000 /* reset status change */ -#define ADMHCD_REG_PORTSTATUS1 0x7c -#define ADMHCD_REG_HOSTHEAD 0x80 - -#define ADMHCD_NUMPORTS 1 -#define ADMHCD_DESC_ALIGN 16 - -struct admhcd_ed { - /* Don't change first four, they used for DMA */ - u32 control; - struct admhcd_td *tail; - struct admhcd_td *head; - struct admhcd_ed *next; - /* the rest is for the driver only: */ - struct admhcd_td *cur; - struct usb_host_endpoint *ep; - struct urb *urb; - struct admhcd_ed *real; -} __attribute__ ((packed)); - -#define ADMHCD_ED_EPSHIFT 7 /* Shift for endpoint number */ -#define ADMHCD_ED_INT 0x00000800 /* Is this an int endpoint */ -#define ADMHCD_ED_SPEED 0x00002000 /* Is it a high speed dev? */ -#define ADMHCD_ED_SKIP 0x00004000 /* Skip this ED */ -#define ADMHCD_ED_FORMAT 0x00008000 /* Is this an isoc endpoint */ -#define ADMHCD_ED_MAXSHIFT 16 /* Shift for max packet size */ - -struct admhcd_td { - /* Don't change first four, they are used for DMA */ - u32 control; - u32 buffer; - u32 buflen; - struct admhcd_td *next; - /* the rest is for the driver only: */ - struct urb *urb; - struct admhcd_td *real; -} __attribute__ ((packed)); - -#define ADMHCD_TD_OWN 0x80000000 -#define ADMHCD_TD_TOGGLE 0x00000000 -#define ADMHCD_TD_DATA0 0x01000000 -#define ADMHCD_TD_DATA1 0x01800000 -#define ADMHCD_TD_OUT 0x00200000 -#define ADMHCD_TD_IN 0x00400000 -#define ADMHCD_TD_SETUP 0x00000000 -#define ADMHCD_TD_ISO 0x00010000 -#define ADMHCD_TD_R 0x00040000 -#define ADMHCD_TD_INTEN 0x00010000 - -static int admhcd_td_err[16] = { - 0, /* No */ - -EREMOTEIO, /* CRC */ - -EREMOTEIO, /* bit stuff */ - -EREMOTEIO, /* data toggle */ - -EPIPE, /* stall */ - -ETIMEDOUT, /* timeout */ - -EPROTO, /* pid err */ - -EPROTO, /* unexpected pid */ - -EREMOTEIO, /* data overrun */ - -EREMOTEIO, /* data underrun */ - -ETIMEDOUT, /* 1010 */ - -ETIMEDOUT, /* 1011 */ - -EREMOTEIO, /* buffer overrun */ - -EREMOTEIO, /* buffer underrun */ - -ETIMEDOUT, /* 1110 */ - -ETIMEDOUT, /* 1111 */ -}; - -#define ADMHCD_TD_ERRMASK 0x38000000 -#define ADMHCD_TD_ERRSHIFT 27 - -#define TD(td) ((struct admhcd_td *)(((u32)(td)) & ~(ADMHCD_DESC_ALIGN-1))) -#define ED(ed) ((struct admhcd_ed *)(((u32)(ed)) & ~(ADMHCD_DESC_ALIGN-1))) - -struct admhcd { - spinlock_t lock; - - /* Root hub registers */ - u32 rhdesca; - u32 rhdescb; - u32 rhstatus; - u32 rhport[2]; - - /* async schedule: control, bulk */ - struct list_head async; - u32 base; - u32 dma_en; - unsigned long flags; -}; - -static inline struct admhcd *hcd_to_admhcd(struct usb_hcd *hcd) -{ - return (struct admhcd *)(hcd->hcd_priv); -} - -static inline struct usb_hcd *admhcd_to_hcd(struct admhcd *admhcd) -{ - return container_of((void *)admhcd, struct usb_hcd, hcd_priv); -} +#define DRIVER_VERSION "0.25.0" +#define DRIVER_AUTHOR "Gabor Juhos " +#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver" -static char hcd_name[] = "adm5120-hcd"; +/*-------------------------------------------------------------------------*/ -static u32 admhcd_reg_get(struct admhcd *ahcd, int reg) -{ - return *(volatile u32 *)KSEG1ADDR(ahcd->base+reg); -} +#undef ADMHC_VERBOSE_DEBUG /* not always helpful */ -static void admhcd_reg_set(struct admhcd *ahcd, int reg, u32 val) -{ - *(volatile u32 *)KSEG1ADDR(ahcd->base+reg) = val; -} - -static void admhcd_lock(struct admhcd *ahcd) -{ - spin_lock_irqsave(&ahcd->lock, ahcd->flags); - ahcd->dma_en = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL) & - ADMHCD_DMA_EN; - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP); -} +/* For initializing controller (mask in an HCFS mode too) */ +#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR -static void admhcd_unlock(struct admhcd *ahcd) -{ - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, - ADMHCD_STATE_OP | ahcd->dma_en); - spin_unlock_irqrestore(&ahcd->lock, ahcd->flags); -} +#define ADMHC_INTR_INIT \ + ( ADMHC_INTR_MIE | ADMHC_INTR_INSM | ADMHC_INTR_FATI \ + | ADMHC_INTR_RESI | ADMHC_INTR_TDC | ADMHC_INTR_BABI ) -static struct admhcd_td *admhcd_td_alloc(struct admhcd_ed *ed, struct urb *urb) -{ - struct admhcd_td *tdn, *td; - - tdn = kzalloc(sizeof(*tdn)+ADMHCD_DESC_ALIGN, GFP_ATOMIC); - if (!tdn) - return NULL; - - tdn->real = tdn; - tdn = TD(KSEG1ADDR(tdn)); - if (ed->cur == NULL) { - ed->cur = tdn; - ed->head = tdn; - ed->tail = tdn; - td = tdn; - } else { - /* Supply back the old tail and link in new td as tail */ - td = TD(ed->tail); - TD(ed->tail)->next = tdn; - ed->tail = tdn; - } - td->urb = urb; +/*-------------------------------------------------------------------------*/ - return td; -} +static const char hcd_name [] = "admhc-hcd"; -static void admhcd_td_free(struct admhcd_ed *ed, struct urb *urb) -{ - struct admhcd_td *td, **tdp; - - if (urb == NULL) - ed->control |= ADMHCD_ED_SKIP; - tdp = &ed->cur; - td = ed->cur; - do { - if (td->urb == urb) - break; - tdp = &td->next; - td = TD(td->next); - } while (td); - while (td && td->urb == urb) { - *tdp = TD(td->next); - kfree(td->real); - td = *tdp; - } -} +#define STATECHANGE_DELAY msecs_to_jiffies(300) -/* Find an endpoint's descriptor, if needed allocate a new one and link it - in the DMA chain - */ -static struct admhcd_ed *admhcd_get_ed(struct admhcd *ahcd, - struct usb_host_endpoint *ep, struct urb *urb) -{ - struct admhcd_ed *hosthead; - struct admhcd_ed *found = NULL, *ed = NULL; - unsigned int pipe = urb->pipe; - - admhcd_lock(ahcd); - hosthead = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD); - if (hosthead) { - for (ed = hosthead;; ed = ED(ed->next)) { - if (ed->ep == ep) { - found = ed; - break; - } - if (ED(ed->next) == hosthead) - break; - } - } - if (!found) { - found = kzalloc(sizeof(*found)+ADMHCD_DESC_ALIGN, GFP_ATOMIC); - if (!found) - goto out; - found->real = found; - found->ep = ep; - found = ED(KSEG1ADDR(found)); - found->control = usb_pipedevice(pipe) | - (usb_pipeendpoint(pipe) << ADMHCD_ED_EPSHIFT) | - (usb_pipeint(pipe) ? ADMHCD_ED_INT : 0) | - (urb->dev->speed == USB_SPEED_FULL ? ADMHCD_ED_SPEED : 0) | - (usb_pipeisoc(pipe) ? ADMHCD_ED_FORMAT : 0) | - (usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)) << ADMHCD_ED_MAXSHIFT); - /* Alloc first dummy td */ - admhcd_td_alloc(found, NULL); - if (hosthead) { - found->next = hosthead; - ed->next = found; - } else { - found->next = found; - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)found); - } - } -out: - admhcd_unlock(ahcd); - return found; -} +#include "adm5120.h" -static struct admhcd_td *admhcd_td_fill(u32 control, struct admhcd_td *td, - dma_addr_t data, int len) -{ - td->buffer = data; - td->buflen = len; - td->control = control; - return TD(td->next); -} +static void admhc_dump(struct admhcd *ahcd, int verbose); +static int admhc_init(struct admhcd *ahcd); +static void admhc_stop(struct usb_hcd *hcd); -static void admhcd_ed_start(struct admhcd *ahcd, struct admhcd_ed *ed) -{ - struct admhcd_td *td = ed->cur; +#include "adm5120-dbg.c" +#include "adm5120-mem.c" +#include "adm5120-pm.c" +#include "adm5120-hub.c" +#include "adm5120-q.c" - if (ed->urb) - return; - if (td->urb) { - ed->urb = td->urb; - while (1) { - td->control |= ADMHCD_TD_OWN; - if (TD(td->next)->urb != td->urb) { - td->buflen |= ADMHCD_TD_INTEN; - break; - } - td = TD(td->next); - } - } - ed->head = TD(ed->head); - ahcd->dma_en |= ADMHCD_DMA_EN; -} +/*-------------------------------------------------------------------------*/ -static irqreturn_t admhcd_irq(struct usb_hcd *hcd) +/* + * queue up an urb for anything except the root hub + */ +static int admhc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags) { - struct admhcd *ahcd = hcd_to_admhcd(hcd); - u32 intstatus; - - intstatus = admhcd_reg_get(ahcd, ADMHCD_REG_INTSTATUS); - if (intstatus & ADMHCD_INT_FATAL) { - admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_FATAL); - /* FIXME: handle fatal interrupts */ - } - - if (intstatus & ADMHCD_INT_SW) { - admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_SW); - /* FIXME: handle software interrupts */ - } - - if (intstatus & ADMHCD_INT_TD) { - struct admhcd_ed *ed, *head; - - admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_TD); - - head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD); - ed = head; - if (ed) do { - /* Is it a finished TD? */ - if (ed->urb && !(ed->cur->control & ADMHCD_TD_OWN)) { - struct admhcd_td *td; - int error; - - td = ed->cur; - error = (td->control & ADMHCD_TD_ERRMASK) >> - ADMHCD_TD_ERRSHIFT; - ed->urb->status = admhcd_td_err[error]; - admhcd_td_free(ed, ed->urb); - // Calculate real length!!! - ed->urb->actual_length = ed->urb->transfer_buffer_length; - ed->urb->hcpriv = NULL; - usb_hcd_giveback_urb(hcd, ed->urb); - ed->urb = NULL; - } - admhcd_ed_start(ahcd, ed); - ed = ED(ed->next); - } while (ed != head); - } + struct admhcd *ahcd = hcd_to_admhcd(hcd); + struct ed *ed; + struct urb_priv *urb_priv; + unsigned int pipe = urb->pipe; + int td_cnt = 0; + unsigned long flags; + int ret = 0; - return IRQ_HANDLED; -} +#ifdef ADMHC_VERBOSE_DEBUG + spin_lock_irqsave(&ahcd->lock, flags); + urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe), -EINPROGRESS); + spin_unlock_irqrestore(&ahcd->lock, flags); +#endif -static int admhcd_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *ep, - struct urb *urb, gfp_t mem_flags) -{ - struct admhcd *ahcd = hcd_to_admhcd(hcd); - struct admhcd_ed *ed; - struct admhcd_td *td; - int size = 0, i, zero = 0, ret = 0; - unsigned int pipe = urb->pipe, toggle = 0; - dma_addr_t data = (dma_addr_t)urb->transfer_buffer; - int data_len = urb->transfer_buffer_length; - - ed = admhcd_get_ed(ahcd, ep, urb); + /* every endpoint has an ed, locate and maybe (re)initialize it */ + ed = ed_get(ahcd, urb->ep, urb->dev, pipe, urb->interval); if (!ed) return -ENOMEM; - switch(usb_pipetype(pipe)) { + /* for the private part of the URB we need the number of TDs */ + switch (ed->type) { case PIPE_CONTROL: - size = 2; - case PIPE_INTERRUPT: + if (urb->transfer_buffer_length > TD_DATALEN_MAX) + /* td_submit_urb() doesn't yet handle these */ + return -EMSGSIZE; + + /* 1 TD for setup, 1 for ACK, plus ... */ + td_cnt = 2; + /* FALLTHROUGH */ case PIPE_BULK: - default: - size += urb->transfer_buffer_length / 4096; - if (urb->transfer_buffer_length % 4096) - size++; - if (size == 0) - size++; - else if (urb->transfer_flags & URB_ZERO_PACKET && - !(urb->transfer_buffer_length % - usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)))) { - size++; - zero = 1; - } + /* one TD for every 4096 Bytes (can be upto 8K) */ + td_cnt += urb->transfer_buffer_length / TD_DATALEN_MAX; + /* ... and for any remaining bytes ... */ + if ((urb->transfer_buffer_length % TD_DATALEN_MAX) != 0) + td_cnt++; + /* ... and maybe a zero length packet to wrap it up */ + if (td_cnt == 0) + td_cnt++; + else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 + && (urb->transfer_buffer_length + % usb_maxpacket(urb->dev, pipe, + usb_pipeout (pipe))) == 0) + td_cnt++; + break; + case PIPE_INTERRUPT: + /* + * for Interrupt IN/OUT transactions, each ED contains + * only 1 TD. + * TODO: check transfer_buffer_length? + */ + td_cnt = 1; break; case PIPE_ISOCHRONOUS: - size = urb->number_of_packets; + /* number of packets from URB */ + td_cnt = urb->number_of_packets; break; } - admhcd_lock(ahcd); - /* Remember the first td */ - td = admhcd_td_alloc(ed, urb); - if (!td) { - ret = -ENOMEM; - goto out; - } - /* Allocate additionall tds first */ - for (i = 1; i < size; i++) { - if (admhcd_td_alloc(ed, urb) == NULL) { - admhcd_td_free(ed, urb); - ret = -ENOMEM; - goto out; - } - } + urb_priv = urb_priv_alloc(ahcd, td_cnt, mem_flags); + if (!urb_priv) + return -ENOMEM; - if (usb_gettoggle(urb->dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) - toggle = ADMHCD_TD_TOGGLE; - else { - toggle = ADMHCD_TD_DATA0; - usb_settoggle(urb->dev, usb_pipeendpoint(pipe), - usb_pipeout(pipe), 1); + urb_priv->ed = ed; + + spin_lock_irqsave(&ahcd->lock, flags); + /* don't submit to a dead HC */ + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + ret = -ENODEV; + goto fail; + } + if (!HC_IS_RUNNING(hcd->state)) { + ret = -ENODEV; + goto fail; } - switch(usb_pipetype(pipe)) { - case PIPE_CONTROL: - td = admhcd_td_fill(ADMHCD_TD_SETUP | ADMHCD_TD_DATA0, - td, (dma_addr_t)urb->setup_packet, 8); - while (data_len > 0) { - td = admhcd_td_fill(ADMHCD_TD_DATA1 - | ADMHCD_TD_R | - (usb_pipeout(pipe) ? - ADMHCD_TD_OUT : ADMHCD_TD_IN), td, - data, data_len % 4097); - data_len -= 4096; - } - admhcd_td_fill(ADMHCD_TD_DATA1 | (usb_pipeout(pipe) ? - ADMHCD_TD_IN : ADMHCD_TD_OUT), td, - data, 0); - break; - case PIPE_INTERRUPT: - case PIPE_BULK: - //info ok for interrupt? - i = 0; - while(data_len > 4096) { - td = admhcd_td_fill((usb_pipeout(pipe) ? - ADMHCD_TD_OUT : - ADMHCD_TD_IN | ADMHCD_TD_R) | - (i ? ADMHCD_TD_TOGGLE : toggle), td, - data, 4096); - data += 4096; - data_len -= 4096; - i++; + ret = usb_hcd_link_urb_to_ep(hcd, urb); + if (ret) + goto fail; + + /* schedule the ed if needed */ + if (ed->state == ED_IDLE) { + ret = ed_schedule(ahcd, ed); + if (ret < 0) { + usb_hcd_unlink_urb_from_ep(hcd, urb); + goto fail; } - td = admhcd_td_fill((usb_pipeout(pipe) ? - ADMHCD_TD_OUT : ADMHCD_TD_IN) | - (i ? ADMHCD_TD_TOGGLE : toggle), td, data, data_len); - i++; - if (zero) - admhcd_td_fill((usb_pipeout(pipe) ? - ADMHCD_TD_OUT : ADMHCD_TD_IN) | - (i ? ADMHCD_TD_TOGGLE : toggle), td, 0, 0); - break; - case PIPE_ISOCHRONOUS: - for (i = 0; i < urb->number_of_packets; i++) { - td = admhcd_td_fill(ADMHCD_TD_ISO | - ((urb->start_frame + i) & 0xffff), td, - data + urb->iso_frame_desc[i].offset, - urb->iso_frame_desc[i].length); + if (ed->type == PIPE_ISOCHRONOUS) { + u16 frame = admhc_frame_no(ahcd); + + /* delay a few frames before the first TD */ + frame += max_t (u16, 8, ed->interval); + frame &= ~(ed->interval - 1); + frame |= ed->branch; + urb->start_frame = frame; + + /* yes, only URB_ISO_ASAP is supported, and + * urb->start_frame is never used as input. + */ } - break; - } - urb->hcpriv = ed; - admhcd_ed_start(ahcd, ed); -out: - admhcd_unlock(ahcd); + } else if (ed->type == PIPE_ISOCHRONOUS) + urb->start_frame = ed->last_iso + ed->interval; + + /* fill the TDs and link them to the ed; and + * enable that part of the schedule, if needed + * and update count of queued periodic urbs + */ + urb->hcpriv = urb_priv; + td_submit_urb(ahcd, urb); + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1); +#endif + +fail: + if (ret) + urb_priv_free(ahcd, urb_priv); + + spin_unlock_irqrestore(&ahcd->lock, flags); return ret; } -static int admhcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb) +/* + * decouple the URB from the HC queues (TDs, urb_priv); + * reporting is always done + * asynchronously, and we might be dealing with an urb that's + * partially transferred, or an ED with other urbs being unlinked. + */ +static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, + int status) { struct admhcd *ahcd = hcd_to_admhcd(hcd); - struct admhcd_ed *ed; + unsigned long flags; + int ret; - admhcd_lock(ahcd); + spin_lock_irqsave(&ahcd->lock, flags); - ed = urb->hcpriv; - if (ed && ed->urb != urb) - admhcd_td_free(ed, urb); +#ifdef ADMHC_VERBOSE_DEBUG + urb_print(ahcd, urb, "DEQUEUE", 1, status); +#endif + ret = usb_hcd_check_unlink_urb(hcd, urb, status); + if (ret) { + /* Do nothing */ + ; + } else if (HC_IS_RUNNING(hcd->state)) { + struct urb_priv *urb_priv; + + /* Unless an IRQ completed the unlink while it was being + * handed to us, flag it for unlink and giveback, and force + * some upcoming INTR_SF to call finish_unlinks() + */ + urb_priv = urb->hcpriv; + if (urb_priv) { + if (urb_priv->ed->state == ED_OPER) + start_ed_unlink(ahcd, urb_priv->ed); + } + } else { + /* + * with HC dead, we won't respect hc queue pointers + * any more ... just clean up every urb's memory. + */ + if (urb->hcpriv) + finish_urb(ahcd, urb, status); + } + spin_unlock_irqrestore(&ahcd->lock, flags); - admhcd_unlock(ahcd); - return 0; + return ret; } -static void admhcd_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep) +/*-------------------------------------------------------------------------*/ + +/* frees config/altsetting state for endpoints, + * including ED memory, dummy TD, and bulk/intr data toggle + */ + +static void admhc_endpoint_disable(struct usb_hcd *hcd, + struct usb_host_endpoint *ep) { - struct admhcd *ahcd = hcd_to_admhcd(hcd); - struct admhcd_ed *ed, *edt, *head; + struct admhcd *ahcd = hcd_to_admhcd(hcd); + unsigned long flags; + struct ed *ed = ep->hcpriv; + unsigned limit = 1000; - admhcd_lock(ahcd); + /* ASSERT: any requests/urbs are being unlinked */ + /* ASSERT: nobody can be submitting urbs for this any more */ - head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD); - if (!head) - goto out; - for (ed = head; ED(ed->next) != head; ed = ED(ed->next)) - if (ed->ep == ep) + if (!ed) + return; + +#ifdef ADMHC_VERBOSE_DEBUG + spin_lock_irqsave(&ahcd->lock, flags); + admhc_dump_ed(ahcd, "EP-DISABLE", ed, 1); + spin_unlock_irqrestore(&ahcd->lock, flags); +#endif + +rescan: + spin_lock_irqsave(&ahcd->lock, flags); + + if (!HC_IS_RUNNING(hcd->state)) { +sanitize: + ed->state = ED_IDLE; + finish_unlinks(ahcd, 0); + } + + switch (ed->state) { + case ED_UNLINK: /* wait for hw to finish? */ + /* major IRQ delivery trouble loses INTR_SOFI too... */ + if (limit-- == 0) { + admhc_warn(ahcd, "IRQ INTR_SOFI lossage\n"); + goto sanitize; + } + spin_unlock_irqrestore(&ahcd->lock, flags); + schedule_timeout_uninterruptible(1); + goto rescan; + case ED_IDLE: /* fully unlinked */ + if (list_empty(&ed->td_list)) { + td_free (ahcd, ed->dummy); + ed_free (ahcd, ed); break; - if (ed->ep != ep) - goto out; - while (ed->cur) - admhcd_td_free(ed, ed->cur->urb); - if (head == ed) { - if (ED(ed->next) == ed) { - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0); - ahcd->dma_en = 0; - goto out_free; } - head = ED(ed->next); - for (edt = head; ED(edt->next) != head; edt = ED(edt->next)); - edt->next = ED(ed->next); - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)ed->next); - goto out_free; + /* else FALL THROUGH */ + default: + /* caller was supposed to have unlinked any requests; + * that's not our job. can't recover; must leak ed. + */ + admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n", + ed, ep->desc.bEndpointAddress, ed->state, + list_empty(&ed->td_list) ? "" : " (has tds)"); + td_free(ahcd, ed->dummy); + break; } - for (edt = head; edt->next != ed; edt = edt->next); - edt->next = ed->next; -out_free: - kfree(ed->real); -out: - admhcd_unlock(ahcd); + ep->hcpriv = NULL; + + spin_unlock_irqrestore(&ahcd->lock, flags); + return; } -static int admhcd_get_frame_number(struct usb_hcd *hcd) +static int admhc_get_frame_number(struct usb_hcd *hcd) { struct admhcd *ahcd = hcd_to_admhcd(hcd); - return admhcd_reg_get(ahcd, ADMHCD_REG_FMNUMBER) & 0x0000ffff; + return admhc_frame_no(ahcd); } -static int admhcd_hub_status_data(struct usb_hcd *hcd, char *buf) +static void admhc_usb_reset(struct admhcd *ahcd) { - struct admhcd *ahcd = hcd_to_admhcd(hcd); - int port; - - *buf = 0; - for (port = 0; port < ADMHCD_NUMPORTS; port++) { - if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4) & - (ADMHCD_CSC | ADMHCD_PESC | ADMHCD_PSSC | ADMHCD_OCIC | - ADMHCD_PRSC)) - *buf |= (1 << (port + 1)); - } - return !!*buf; +#if 0 + ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); + ahcd->hc_control &= OHCI_CTRL_RWC; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->regs->control); +#else + /* FIXME */ + ahcd->host_control = ADMHC_BUSS_RESET; + admhc_writel(ahcd, ahcd->host_control ,&ahcd->regs->host_control); +#endif } -static __u8 root_hub_hub_des[] = { - 0x09, /* __u8 bLength; */ - 0x29, /* __u8 bDescriptorType; Hub-descriptor */ - 0x02, /* __u8 bNbrPorts; */ - 0x0a, 0x00, /* __u16 wHubCharacteristics; */ - 0x01, /* __u8 bPwrOn2pwrGood; 2ms */ - 0x00, /* __u8 bHubContrCurrent; 0mA */ - 0x00, /* __u8 DeviceRemovable; */ - 0xff, /* __u8 PortPwrCtrlMask; */ -}; - -static int admhcd_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, - u16 wIndex, char *buf, u16 wLength) +/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and + * other cases where the next software may expect clean state from the + * "firmware". this is bus-neutral, unlike shutdown() methods. + */ +static void +admhc_shutdown(struct usb_hcd *hcd) { - struct admhcd *ahcd = hcd_to_admhcd(hcd); - int retval = 0, len; - unsigned int port = wIndex -1; + struct admhcd *ahcd; - switch (typeReq) { + ahcd = hcd_to_admhcd(hcd); + admhc_intr_disable(ahcd, ADMHC_INTR_MIE); + admhc_dma_disable(ahcd); + admhc_usb_reset(ahcd); + /* flush the writes */ + admhc_writel_flush(ahcd); +} - case GetHubStatus: - *(__le32 *)buf = cpu_to_le32(0); - break; - case GetPortStatus: - if (port >= ADMHCD_NUMPORTS) - goto err; - *(__le32 *)buf = cpu_to_le32( - admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4)); - break; - case SetHubFeature: /* We don't implement these */ - case ClearHubFeature: - switch (wValue) { - case C_HUB_OVER_CURRENT: - case C_HUB_LOCAL_POWER: - break; - default: - goto err; - } - case SetPortFeature: - if (port >= ADMHCD_NUMPORTS) - goto err; - - switch (wValue) { - case USB_PORT_FEAT_SUSPEND: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PSS); - break; - case USB_PORT_FEAT_RESET: - if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4) - & ADMHCD_CCS) { - admhcd_reg_set(ahcd, - ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PRS | ADMHCD_CSC); - mdelay(50); - admhcd_reg_set(ahcd, - ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PES | ADMHCD_CSC); - } - break; - case USB_PORT_FEAT_POWER: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PPS); - break; - default: - goto err; - } - break; - case ClearPortFeature: - if (port >= ADMHCD_NUMPORTS) - goto err; - - switch (wValue) { - case USB_PORT_FEAT_ENABLE: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_CCS); - break; - case USB_PORT_FEAT_C_ENABLE: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PESC); - break; - case USB_PORT_FEAT_SUSPEND: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_POCI); - break; - case USB_PORT_FEAT_C_SUSPEND: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PSSC); - case USB_PORT_FEAT_POWER: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_LSDA); - break; - case USB_PORT_FEAT_C_CONNECTION: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_CSC); - break; - case USB_PORT_FEAT_C_OVER_CURRENT: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_OCIC); - break; - case USB_PORT_FEAT_C_RESET: - admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4, - ADMHCD_PRSC); - break; - default: - goto err; - } - break; - case GetHubDescriptor: - len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength); - memcpy(buf, root_hub_hub_des, len); - break; - default: -err: - retval = -EPIPE; +/*-------------------------------------------------------------------------* + * HC functions + *-------------------------------------------------------------------------*/ + +static void admhc_eds_cleanup(struct admhcd *ahcd) +{ + if (ahcd->ed_tails[PIPE_INTERRUPT]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_INTERRUPT]); + ahcd->ed_tails[PIPE_INTERRUPT] = NULL; } - return retval; -} + if (ahcd->ed_tails[PIPE_ISOCHRONOUS]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_ISOCHRONOUS]); + ahcd->ed_tails[PIPE_ISOCHRONOUS] = NULL; + } -static int admhcd_start(struct usb_hcd *hcd) -{ - struct admhcd *ahcd = hcd_to_admhcd(hcd); - unsigned long flags; + if (ahcd->ed_tails[PIPE_CONTROL]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_CONTROL]); + ahcd->ed_tails[PIPE_CONTROL] = NULL; + } - spin_lock_irqsave(&ahcd->lock, flags); + if (ahcd->ed_tails[PIPE_BULK]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_BULK]); + ahcd->ed_tails[PIPE_BULK] = NULL; + } - /* Initialise the HCD registers */ - admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0); - mdelay(10); + ahcd->ed_head = NULL; +} - admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET); +#define ED_DUMMY_INFO (ED_SPEED_FULL | ED_SKIP) - while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET) { - printk(KERN_WARNING PFX "waiting for reset to complete\n"); - mdelay(1); - } +static int admhc_eds_init(struct admhcd *ahcd) +{ + struct ed *ed; - //hcd->uses_new_polling = 1; + ed = ed_create(ahcd, PIPE_INTERRUPT, ED_DUMMY_INFO); + if (!ed) + goto err; - /* Enable USB host mode */ - admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN); + ahcd->ed_tails[PIPE_INTERRUPT] = ed; - /* Set host specific settings */ - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0x00000000); - admhcd_reg_set(ahcd, ADMHCD_REG_FMINTERVAL, 0x20002edf); - admhcd_reg_set(ahcd, ADMHCD_REG_LSTHRESH, 0x628); + ed = ed_create(ahcd, PIPE_ISOCHRONOUS, ED_DUMMY_INFO); + if (!ed) + goto err; - /* Set interrupts */ - admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, ADMHCD_INT_ACT | - ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD); - admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_ACT | - ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD); + ahcd->ed_tails[PIPE_ISOCHRONOUS] = ed; + ed->ed_prev = ahcd->ed_tails[PIPE_INTERRUPT]; + ahcd->ed_tails[PIPE_INTERRUPT]->ed_next = ed; + ahcd->ed_tails[PIPE_INTERRUPT]->hwNextED = cpu_to_hc32(ahcd, ed->dma); - /* Power on all ports */ - admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC); + ed = ed_create(ahcd, PIPE_CONTROL, ED_DUMMY_INFO); + if (!ed) + goto err; - /* HCD is now operationnal */ - admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP); + ahcd->ed_tails[PIPE_CONTROL] = ed; + ed->ed_prev = ahcd->ed_tails[PIPE_ISOCHRONOUS]; + ahcd->ed_tails[PIPE_ISOCHRONOUS]->ed_next = ed; + ahcd->ed_tails[PIPE_ISOCHRONOUS]->hwNextED = cpu_to_hc32(ahcd, ed->dma); - hcd->state = HC_STATE_RUNNING; + ed = ed_create(ahcd, PIPE_BULK, ED_DUMMY_INFO); + if (!ed) + goto err; - spin_unlock_irqrestore(&ahcd->lock, flags); + ahcd->ed_tails[PIPE_BULK] = ed; + ed->ed_prev = ahcd->ed_tails[PIPE_CONTROL]; + ahcd->ed_tails[PIPE_CONTROL]->ed_next = ed; + ahcd->ed_tails[PIPE_CONTROL]->hwNextED = cpu_to_hc32(ahcd, ed->dma); + + ahcd->ed_head = ahcd->ed_tails[PIPE_INTERRUPT]; + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "ed intr", ahcd->ed_tails[PIPE_INTERRUPT], 1); + admhc_dump_ed(ahcd, "ed isoc", ahcd->ed_tails[PIPE_ISOCHRONOUS], 1); + admhc_dump_ed(ahcd, "ed ctrl", ahcd->ed_tails[PIPE_CONTROL], 1); + admhc_dump_ed(ahcd, "ed bulk", ahcd->ed_tails[PIPE_BULK], 1); +#endif return 0; + +err: + admhc_eds_cleanup(ahcd); + return -ENOMEM; } -static int admhcd_sw_reset(struct admhcd *ahcd) +/* init memory, and kick BIOS/SMM off */ + +static int admhc_init(struct admhcd *ahcd) { - int retries = 15; - unsigned long flags; - int ret = 0; + struct usb_hcd *hcd = admhcd_to_hcd(ahcd); + int ret; - spin_lock_irqsave(&ahcd->lock, flags); + admhc_disable(ahcd); + ahcd->regs = hcd->regs; - admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0); - mdelay(10); + /* Disable HC interrupts */ + admhc_intr_disable(ahcd, ADMHC_INTR_MIE); - admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET); + /* Read the number of ports unless overridden */ + if (ahcd->num_ports == 0) + ahcd->num_ports = admhc_read_rhdesc(ahcd) & ADMHC_RH_NUMP; - while (--retries) { - mdelay(1); - if (!(admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET)) - break; - } - if (!retries) { - printk(KERN_WARNING "%s: software reset timeout\n", hcd_name); - ret = -ETIME; - } - spin_unlock_irqrestore(&ahcd->lock, flags); + ret = admhc_mem_init(ahcd); + if (ret) + goto err; + + /* init dummy endpoints */ + ret = admhc_eds_init(ahcd); + if (ret) + goto err; + + create_debug_files(ahcd); + + return 0; + +err: + admhc_stop(hcd); return ret; } -static int admhcd_reset(struct usb_hcd *hcd) +/*-------------------------------------------------------------------------*/ + +/* Start an OHCI controller, set the BUS operational + * resets USB and controller + * enable interrupts + */ +static int admhc_run(struct admhcd *ahcd) { - struct admhcd *ahcd = hcd_to_admhcd(hcd); - u32 state = 0; - int ret, timeout = 15; /* ms */ - unsigned long t; + u32 temp; + int first = ahcd->fminterval == 0; + struct usb_hcd *hcd = admhcd_to_hcd(ahcd); + + admhc_disable(ahcd); + + /* boot firmware should have set this up (5.1.1.3.1) */ + if (first) { + temp = admhc_readl(ahcd, &ahcd->regs->fminterval); + ahcd->fminterval = temp & ADMHC_SFI_FI_MASK; + if (ahcd->fminterval != FI) + admhc_dbg(ahcd, "fminterval delta %d\n", + ahcd->fminterval - FI); + ahcd->fminterval |= + (FSLDP(ahcd->fminterval) << ADMHC_SFI_FSLDP_SHIFT); + /* also: power/overcurrent flags in rhdesc */ + } - ret = admhcd_sw_reset(ahcd); - if (ret) - return ret; - - t = jiffies + msecs_to_jiffies(timeout); - do { - spin_lock_irq(&ahcd->lock); - state = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL); - spin_unlock_irq(&ahcd->lock); - state &= ADMHCD_STATE_MASK; - if (state == ADMHCD_STATE_RST) - break; - msleep(4); - } while (time_before_eq(jiffies, t)); +#if 0 /* TODO: not applicable */ + /* Reset USB nearly "by the book". RemoteWakeupConnected was + * saved if boot firmware (BIOS/SMM/...) told us it's connected, + * or if bus glue did the same (e.g. for PCI add-in cards with + * PCI PM support). + */ + if ((ahcd->hc_control & OHCI_CTRL_RWC) != 0 + && !device_may_wakeup(hcd->self.controller)) + device_init_wakeup(hcd->self.controller, 1); +#endif - if (state != ADMHCD_STATE_RST) { - printk(KERN_WARNING "%s: device not ready after %dms\n", - hcd_name, timeout); - ret = -ENODEV; + switch (ahcd->host_control & ADMHC_HC_BUSS) { + case ADMHC_BUSS_OPER: + temp = 0; + break; + case ADMHC_BUSS_SUSPEND: + /* FALLTHROUGH ? */ + case ADMHC_BUSS_RESUME: + ahcd->host_control = ADMHC_BUSS_RESUME; + temp = 10 /* msec wait */; + break; + /* case ADMHC_BUSS_RESET: */ + default: + ahcd->host_control = ADMHC_BUSS_RESET; + temp = 50 /* msec wait */; + break; } + admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control); - return ret; -} + /* flush the writes */ + admhc_writel_flush(ahcd); -static void admhcd_stop(struct usb_hcd *hcd) -{ - struct admhcd *ahcd = hcd_to_admhcd(hcd); - unsigned long flags; - u32 val; + msleep(temp); + temp = admhc_read_rhdesc(ahcd); + if (!(temp & ADMHC_RH_NPS)) { + /* power down each port */ + for (temp = 0; temp < ahcd->num_ports; temp++) + admhc_write_portstatus(ahcd, temp, ADMHC_PS_CPP); + } + /* flush those writes */ + admhc_writel_flush(ahcd); + + /* 2msec timelimit here means no irqs/preempt */ + spin_lock_irq(&ahcd->lock); + + admhc_writel(ahcd, ADMHC_CTRL_SR, &ahcd->regs->gencontrol); + temp = 30; /* ... allow extra time */ + while ((admhc_readl(ahcd, &ahcd->regs->gencontrol) & ADMHC_CTRL_SR) != 0) { + if (--temp == 0) { + spin_unlock_irq(&ahcd->lock); + admhc_err(ahcd, "USB HC reset timed out!\n"); + return -1; + } + udelay(1); + } - spin_lock_irqsave(&ahcd->lock, flags); - admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0); + /* enable HOST mode, before access any host specific register */ + admhc_writel(ahcd, ADMHC_CTRL_UHFE, &ahcd->regs->gencontrol); - /* Set global control of power for ports */ - val = admhcd_reg_get(ahcd, ADMHCD_REG_RHDESCR); - val &= (~ADMHCD_PSM | ADMHCD_LPS); - admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, val); + /* Tell the controller where the descriptor list is */ + admhc_writel(ahcd, (u32)ahcd->ed_head->dma, &ahcd->regs->hosthead); - spin_unlock_irqrestore(&ahcd->lock, flags); + periodic_reinit(ahcd); - /* Ask for software reset */ - admhcd_sw_reset(ahcd); -} + /* use rhsc irqs after khubd is fully initialized */ + hcd->poll_rh = 1; + hcd->uses_new_polling = 1; +#if 0 + /* wake on ConnectStatusChange, matching external hubs */ + admhc_writel(ahcd, RH_HS_DRWE, &ahcd->regs->roothub.status); +#else + /* FIXME roothub_write_status (ahcd, ADMHC_RH_DRWE); */ +#endif -static struct hc_driver adm5120_hc_driver = { - .description = hcd_name, - .product_desc = "ADM5120 HCD", - .hcd_priv_size = sizeof(struct admhcd), - .irq = admhcd_irq, - .flags = HCD_USB11, - .urb_enqueue = admhcd_urb_enqueue, - .urb_dequeue = admhcd_urb_dequeue, - .endpoint_disable = admhcd_endpoint_disable, - .get_frame_number = admhcd_get_frame_number, - .hub_status_data = admhcd_hub_status_data, - .hub_control = admhcd_hub_control, - .start = admhcd_start, - .stop = admhcd_stop, - .reset = admhcd_reset, -}; - -#define resource_len(r) (((r)->end - (r)->start) + 1) - -static int __init adm5120hcd_probe(struct platform_device *pdev) -{ - struct usb_hcd *hcd; - struct admhcd *ahcd; - struct resource *data; - void __iomem *data_reg; + /* Choose the interrupts we care about now, others later on demand */ + admhc_intr_ack(ahcd, ~0); + admhc_intr_enable(ahcd, ADMHC_INTR_INIT); + + admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc); + + /* flush those writes */ + admhc_writel_flush(ahcd); - int err = 0, irq; + /* start controller operations */ + ahcd->host_control = ADMHC_BUSS_OPER; + admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control); - if (pdev->num_resources < 2) { - printk(KERN_WARNING PFX "not enough resources\n"); - err = -ENODEV; - goto out; + temp = 20; + while ((admhc_readl(ahcd, &ahcd->regs->host_control) + & ADMHC_HC_BUSS) != ADMHC_BUSS_OPER) { + if (--temp == 0) { + spin_unlock_irq(&ahcd->lock); + admhc_err(ahcd, "unable to setup operational mode!\n"); + return -1; + } + mdelay(1); } - irq = platform_get_irq(pdev, 0); - data = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hcd->state = HC_STATE_RUNNING; + + ahcd->next_statechange = jiffies + STATECHANGE_DELAY; + +#if 0 + /* FIXME: enabling DMA is always failed here for an unknown reason */ + admhc_dma_enable(ahcd); - if (pdev->dev.dma_mask) { - printk(KERN_DEBUG PFX "no we won't dma\n"); - return -EINVAL; + temp = 200; + while ((admhc_readl(ahcd, &ahcd->regs->host_control) + & ADMHC_HC_DMAE) != ADMHC_HC_DMAE) { + if (--temp == 0) { + spin_unlock_irq(&ahcd->lock); + admhc_err(ahcd, "unable to enable DMA!\n"); + admhc_dump(ahcd, 1); + return -1; + } + mdelay(1); } - if (!data || irq < 0) { - printk(KERN_DEBUG PFX "either IRQ or data resource is invalid\n"); - err = -ENODEV; - goto out; +#endif + + spin_unlock_irq(&ahcd->lock); + + mdelay(ADMHC_POTPGT); + + return 0; +} + +/*-------------------------------------------------------------------------*/ + +/* an interrupt happens */ + +static irqreturn_t admhc_irq(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + struct admhcd_regs __iomem *regs = ahcd->regs; + u32 ints; + + ints = admhc_readl(ahcd, ®s->int_status); + if ((ints & ADMHC_INTR_INTA) == 0) { + /* no unmasked interrupt status is set */ + return IRQ_NONE; } - if (!request_mem_region(data->start, resource_len(data), hcd_name)) { - printk(KERN_DEBUG PFX "cannot request memory regions for the data resource\n"); - err = -EBUSY; - goto out; + ints &= admhc_readl(ahcd, ®s->int_enable); + + if (ints & ADMHC_INTR_FATI) { + /* e.g. due to PCI Master/Target Abort */ + admhc_disable(ahcd); + admhc_err(ahcd, "Fatal Error, controller disabled\n"); + admhc_dump(ahcd, 1); + admhc_usb_reset(ahcd); } - data_reg = ioremap(data->start, resource_len(data)); - if (data_reg == NULL) { - printk(KERN_DEBUG PFX "unable to ioremap\n"); - err = -ENOMEM; - goto out_mem; - } - - hcd = usb_create_hcd(&adm5120_hc_driver, &pdev->dev, pdev->dev.bus_id); - if (!hcd) { - printk(KERN_DEBUG PFX "unable to create the hcd\n"); - err = -ENOMEM; - goto out_unmap; + if (ints & ADMHC_INTR_BABI) { + admhc_intr_disable(ahcd, ADMHC_INTR_BABI); + admhc_intr_ack(ahcd, ADMHC_INTR_BABI); + admhc_err(ahcd, "Babble Detected\n"); } - hcd->rsrc_start = data->start; - hcd->rsrc_len = resource_len(data); - hcd->regs = data_reg; + if (ints & ADMHC_INTR_INSM) { + admhc_vdbg(ahcd, "Root Hub Status Change\n"); + ahcd->next_statechange = jiffies + STATECHANGE_DELAY; + admhc_intr_ack(ahcd, ADMHC_INTR_RESI | ADMHC_INTR_INSM); + + /* NOTE: Vendors didn't always make the same implementation + * choices for RHSC. Many followed the spec; RHSC triggers + * on an edge, like setting and maybe clearing a port status + * change bit. With others it's level-triggered, active + * until khubd clears all the port status change bits. We'll + * always disable it here and rely on polling until khubd + * re-enables it. + */ + admhc_intr_disable(ahcd, ADMHC_INTR_INSM); + usb_hcd_poll_rh_status(hcd); + } else if (ints & ADMHC_INTR_RESI) { + /* For connect and disconnect events, we expect the controller + * to turn on RHSC along with RD. But for remote wakeup events + * this might not happen. + */ + admhc_vdbg(ahcd, "Resume Detect\n"); + admhc_intr_ack(ahcd, ADMHC_INTR_RESI); + hcd->poll_rh = 1; + if (ahcd->autostop) { + spin_lock(&ahcd->lock); + admhc_rh_resume(ahcd); + spin_unlock(&ahcd->lock); + } else + usb_hcd_resume_root_hub(hcd); + } - ahcd = hcd_to_admhcd(hcd); - ahcd->base = (u32)data_reg; + if (ints & ADMHC_INTR_TDC) { + admhc_vdbg(ahcd, "Transfer Descriptor Complete\n"); + admhc_intr_ack(ahcd, ADMHC_INTR_TDC); + if (HC_IS_RUNNING(hcd->state)) + admhc_intr_disable(ahcd, ADMHC_INTR_TDC); + spin_lock(&ahcd->lock); + admhc_td_complete(ahcd); + spin_unlock(&ahcd->lock); + if (HC_IS_RUNNING(hcd->state)) + admhc_intr_enable(ahcd, ADMHC_INTR_TDC); + } - spin_lock_init(&ahcd->lock); - INIT_LIST_HEAD(&ahcd->async); + if (ints & ADMHC_INTR_SO) { + /* could track INTR_SO to reduce available PCI/... bandwidth */ + admhc_vdbg(ahcd, "Schedule Overrun\n"); + } - hcd->product_desc = "ADM5120 HCD"; +#if 1 + spin_lock(&ahcd->lock); + if (ahcd->ed_rm_list) + finish_unlinks(ahcd, admhc_frame_no(ahcd)); - err = usb_add_hcd(hcd, irq, IRQF_DISABLED); - if (err) { - printk(KERN_DEBUG PFX "unable to add hcd\n"); - goto out_dev; + if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list + && HC_IS_RUNNING(hcd->state)) + admhc_intr_disable(ahcd, ADMHC_INTR_SOFI); + spin_unlock(&ahcd->lock); +#else + if (ints & ADMHC_INTR_SOFI) { + admhc_vdbg(ahcd, "Start Of Frame\n"); + spin_lock(&ahcd->lock); + + /* handle any pending ED removes */ + finish_unlinks(ahcd, admhc_frameno(ahcd)); + + /* leaving INTR_SOFI enabled when there's still unlinking + * to be done in the (next frame). + */ + if ((ahcd->ed_rm_list == NULL) || + HC_IS_RUNNING(hcd->state) == 0) + /* + * disable INTR_SOFI if there are no unlinking to be + * done (in the next frame) + */ + admhc_intr_disable(ahcd, ADMHC_INTR_SOFI); + + spin_unlock(&ahcd->lock); } +#endif - return 0; + if (HC_IS_RUNNING(hcd->state)) { + admhc_intr_ack(ahcd, ints); + admhc_intr_enable(ahcd, ADMHC_INTR_MIE); + admhc_writel_flush(ahcd); + } -out_dev: - usb_put_hcd(hcd); -out_unmap: - iounmap(data_reg); -out_mem: - release_mem_region(data->start, resource_len(data)); -out: - return err; + return IRQ_HANDLED; } -#ifdef CONFIG_PM -static int adm5120hcd_suspend(struct platform_device *pdev, pm_message_t state) -{ - pdev->dev.power.power_state = state; - mdelay(1); - return 0; -} +/*-------------------------------------------------------------------------*/ -static int adm5120hcd_resume(struct platform_device *pdev, pm_message_t state) +static void admhc_stop(struct usb_hcd *hcd) { - pdev->dev.power.power_state = PMSG_ON; - mdelay(1); - return 0; -} -#else -#define adm5120hcd_suspend NULL -#define adm5120hcd_resume NULL -#endif + struct admhcd *ahcd = hcd_to_admhcd(hcd); -static int __init_or_module adm5120hcd_remove(struct platform_device *pdev) -{ - struct usb_hcd *hcd = platform_get_drvdata(pdev); - struct admhcd *ahcd; + admhc_dump(ahcd, 1); - if (!hcd) - return 0; - ahcd = hcd_to_admhcd(hcd); - usb_remove_hcd(hcd); + flush_scheduled_work(); - usb_put_hcd(hcd); - return 0; + admhc_usb_reset(ahcd); + admhc_intr_disable(ahcd, ADMHC_INTR_MIE); + + free_irq(hcd->irq, hcd); + hcd->irq = -1; + + remove_debug_files(ahcd); + admhc_eds_cleanup(ahcd); + admhc_mem_cleanup(ahcd); } -static struct platform_driver adm5120hcd_driver = { - .probe = adm5120hcd_probe, - .remove = adm5120hcd_remove, - .suspend = adm5120hcd_suspend, - .remove = adm5120hcd_resume, - .driver = { - .name = (char *)hcd_name, - .owner = THIS_MODULE, - }, -}; - -static int __init adm5120hcd_init(void) +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_MIPS_ADM5120 +#include "adm5120-drv.c" +#define PLATFORM_DRIVER usb_hcd_adm5120_driver +#endif + +#if !defined(PLATFORM_DRIVER) +#error "missing bus glue for admhc-hcd" +#endif + +#define DRIVER_INFO DRIVER_DESC " version " DRIVER_VERSION + +static int __init admhc_hcd_mod_init(void) { - int ret; + int ret = 0; - if (usb_disabled()) { - printk(KERN_DEBUG PFX "USB support is disabled\n"); + if (usb_disabled()) return -ENODEV; - } - if (mips_machgroup != MACH_GROUP_ADM5120) { - printk(KERN_DEBUG PFX "unsupported machine group\n"); - return -ENODEV; + pr_info("%s: " DRIVER_INFO "\n", hcd_name); + pr_info("%s: block sizes: ed %Zd td %Zd\n", hcd_name, + sizeof (struct ed), sizeof (struct td)); + +#ifdef DEBUG + admhc_debug_root = debugfs_create_dir("admhc", NULL); + if (!admhc_debug_root) { + ret = -ENOENT; + goto error_debug; } +#endif + +#ifdef PLATFORM_DRIVER + ret = platform_driver_register(&PLATFORM_DRIVER); + if (ret < 0) + goto error_platform; +#endif + + return ret; - ret = platform_driver_register(&adm5120hcd_driver); - if (ret == 0) - printk(KERN_INFO PFX "registered\n"); +#ifdef PLATFORM_DRIVER + platform_driver_unregister(&PLATFORM_DRIVER); +error_platform: +#endif +#ifdef DEBUG + debugfs_remove(admhc_debug_root); + admhc_debug_root = NULL; +error_debug: +#endif return ret; } +module_init(admhc_hcd_mod_init); -static void __exit adm5120hcd_exit(void) +static void __exit admhc_hcd_mod_exit(void) { - platform_driver_unregister(&adm5120hcd_driver); - printk(KERN_INFO PFX "driver unregistered\n"); + platform_driver_unregister(&PLATFORM_DRIVER); +#ifdef DEBUG + debugfs_remove(admhc_debug_root); +#endif } +module_exit(admhc_hcd_mod_exit); -module_init(adm5120hcd_init); -module_exit(adm5120hcd_exit); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_INFO); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL v2");