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freifunkist-firmware/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c

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/*
* HCD driver for ADM5120 SoC
*
* Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
*
* Based on the ADMtek 2.4 driver
* (C) Copyright 2003 Junius Chen <juniusc@admtek.com.tw>
* Which again was based on the ohci and uhci drivers.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/platform_device.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include <asm/mach-adm5120/adm5120_info.h>
#include "../core/hcd.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);
}
static char hcd_name[] = "adm5120-hcd";
static u32 admhcd_reg_get(struct admhcd *ahcd, int reg)
{
return *(volatile u32 *)KSEG1ADDR(ahcd->base+reg);
}
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);
}
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);
}
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 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;
}
}
/* 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;
}
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 admhcd_ed_start(struct admhcd *ahcd, struct admhcd_ed *ed)
{
struct admhcd_td *td = ed->cur;
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)
{
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);
}
return IRQ_HANDLED;
}
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);
if (!ed)
return -ENOMEM;
switch(usb_pipetype(pipe)) {
case PIPE_CONTROL:
size = 2;
case PIPE_INTERRUPT:
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;
}
break;
case PIPE_ISOCHRONOUS:
size = 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;
}
}
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);
}
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++;
}
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);
}
break;
}
urb->hcpriv = ed;
admhcd_ed_start(ahcd, ed);
out:
admhcd_unlock(ahcd);
return ret;
}
static int admhcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct admhcd_ed *ed;
admhcd_lock(ahcd);
ed = urb->hcpriv;
if (ed && ed->urb != urb)
admhcd_td_free(ed, urb);
admhcd_unlock(ahcd);
return 0;
}
static void admhcd_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct admhcd_ed *ed, *edt, *head;
admhcd_lock(ahcd);
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)
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;
}
for (edt = head; edt->next != ed; edt = edt->next);
edt->next = ed->next;
out_free:
kfree(ed->real);
out:
admhcd_unlock(ahcd);
}
static int admhcd_get_frame_number(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
return admhcd_reg_get(ahcd, ADMHCD_REG_FMNUMBER) & 0x0000ffff;
}
static int admhcd_hub_status_data(struct usb_hcd *hcd, char *buf)
{
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;
}
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)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int retval = 0, len;
unsigned int port = wIndex -1;
switch (typeReq) {
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;
}
return retval;
}
static int admhcd_start(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
spin_lock_irqsave(&ahcd->lock, flags);
/* Initialise the HCD registers */
admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
mdelay(10);
admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET) {
printk(KERN_WARNING PFX "waiting for reset to complete\n");
mdelay(1);
}
//hcd->uses_new_polling = 1;
/* Enable USB host mode */
admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN);
/* 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);
/* 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);
/* Power on all ports */
admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC);
/* HCD is now operationnal */
admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
hcd->state = HC_STATE_RUNNING;
spin_unlock_irqrestore(&ahcd->lock, flags);
return 0;
}
static int admhcd_sw_reset(struct admhcd *ahcd)
{
int retries = 15;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&ahcd->lock, flags);
admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
mdelay(10);
admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
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);
return ret;
}
static int admhcd_reset(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
u32 state = 0;
int ret, timeout = 15; /* ms */
unsigned long t;
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 (state != ADMHCD_STATE_RST) {
printk(KERN_WARNING "%s: device not ready after %dms\n",
hcd_name, timeout);
ret = -ENODEV;
}
return ret;
}
static void admhcd_stop(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
u32 val;
spin_lock_irqsave(&ahcd->lock, flags);
admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
/* 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);
spin_unlock_irqrestore(&ahcd->lock, flags);
/* Ask for software reset */
admhcd_sw_reset(ahcd);
}
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;
int err = 0, irq;
if (pdev->num_resources < 2) {
printk(KERN_WARNING PFX "not enough resources\n");
err = -ENODEV;
goto out;
}
irq = platform_get_irq(pdev, 0);
data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (pdev->dev.dma_mask) {
printk(KERN_DEBUG PFX "no we won't dma\n");
return -EINVAL;
}
if (!data || irq < 0) {
printk(KERN_DEBUG PFX "either IRQ or data resource is invalid\n");
err = -ENODEV;
goto out;
}
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;
}
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;
}
hcd->rsrc_start = data->start;
hcd->rsrc_len = resource_len(data);
hcd->regs = data_reg;
ahcd = hcd_to_admhcd(hcd);
ahcd->base = (u32)data_reg;
spin_lock_init(&ahcd->lock);
INIT_LIST_HEAD(&ahcd->async);
hcd->product_desc = "ADM5120 HCD";
err = usb_add_hcd(hcd, irq, IRQF_DISABLED);
if (err) {
printk(KERN_DEBUG PFX "unable to add hcd\n");
goto out_dev;
}
return 0;
out_dev:
usb_put_hcd(hcd);
out_unmap:
iounmap(data_reg);
out_mem:
release_mem_region(data->start, resource_len(data));
out:
return err;
}
#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)
{
pdev->dev.power.power_state = PMSG_ON;
mdelay(1);
return 0;
}
#else
#define adm5120hcd_suspend NULL
#define adm5120hcd_resume NULL
#endif
static int __init_or_module adm5120hcd_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct admhcd *ahcd;
if (!hcd)
return 0;
ahcd = hcd_to_admhcd(hcd);
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
return 0;
}
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)
{
int ret;
if (usb_disabled()) {
printk(KERN_DEBUG PFX "USB support is disabled\n");
return -ENODEV;
}
if (mips_machgroup != MACH_GROUP_ADM5120) {
printk(KERN_DEBUG PFX "unsupported machine group\n");
return -ENODEV;
}
ret = platform_driver_register(&adm5120hcd_driver);
if (ret == 0)
printk(KERN_INFO PFX "registered\n");
return ret;
}
static void __exit adm5120hcd_exit(void)
{
platform_driver_unregister(&adm5120hcd_driver);
printk(KERN_INFO PFX "driver unregistered\n");
}
module_init(adm5120hcd_init);
module_exit(adm5120hcd_exit);