mirror of
https://github.com/torvalds/linux.git
synced 2024-12-24 20:01:55 +00:00
8066134ff8
This patch (as1132) implements the set_wedge() method for net2280. This method is necessary for strict USBCV compliance in g_file_storage. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
318 lines
8.6 KiB
C
318 lines
8.6 KiB
C
/*
|
|
* NetChip 2280 high/full speed USB device controller.
|
|
* Unlike many such controllers, this one talks PCI.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2002 NetChip Technology, Inc. (http://www.netchip.com)
|
|
* Copyright (C) 2003 David Brownell
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/usb/net2280.h>
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* indexed registers [11.10] are accessed indirectly
|
|
* caller must own the device lock.
|
|
*/
|
|
|
|
static inline u32
|
|
get_idx_reg (struct net2280_regs __iomem *regs, u32 index)
|
|
{
|
|
writel (index, ®s->idxaddr);
|
|
/* NOTE: synchs device/cpu memory views */
|
|
return readl (®s->idxdata);
|
|
}
|
|
|
|
static inline void
|
|
set_idx_reg (struct net2280_regs __iomem *regs, u32 index, u32 value)
|
|
{
|
|
writel (index, ®s->idxaddr);
|
|
writel (value, ®s->idxdata);
|
|
/* posted, may not be visible yet */
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
|
|
#define REG_DIAG 0x0
|
|
#define RETRY_COUNTER 16
|
|
#define FORCE_PCI_SERR 11
|
|
#define FORCE_PCI_INTERRUPT 10
|
|
#define FORCE_USB_INTERRUPT 9
|
|
#define FORCE_CPU_INTERRUPT 8
|
|
#define ILLEGAL_BYTE_ENABLES 5
|
|
#define FAST_TIMES 4
|
|
#define FORCE_RECEIVE_ERROR 2
|
|
#define FORCE_TRANSMIT_CRC_ERROR 0
|
|
#define REG_FRAME 0x02 /* from last sof */
|
|
#define REG_CHIPREV 0x03 /* in bcd */
|
|
#define REG_HS_NAK_RATE 0x0a /* NAK per N uframes */
|
|
|
|
#define CHIPREV_1 0x0100
|
|
#define CHIPREV_1A 0x0110
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* ep a-f highspeed and fullspeed maxpacket, addresses
|
|
* computed from ep->num
|
|
*/
|
|
#define REG_EP_MAXPKT(dev,num) (((num) + 1) * 0x10 + \
|
|
(((dev)->gadget.speed == USB_SPEED_HIGH) ? 0 : 1))
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* [8.3] for scatter/gather i/o
|
|
* use struct net2280_dma_regs bitfields
|
|
*/
|
|
struct net2280_dma {
|
|
__le32 dmacount;
|
|
__le32 dmaaddr; /* the buffer */
|
|
__le32 dmadesc; /* next dma descriptor */
|
|
__le32 _reserved;
|
|
} __attribute__ ((aligned (16)));
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* DRIVER DATA STRUCTURES and UTILITIES */
|
|
|
|
struct net2280_ep {
|
|
struct usb_ep ep;
|
|
struct net2280_ep_regs __iomem *regs;
|
|
struct net2280_dma_regs __iomem *dma;
|
|
struct net2280_dma *dummy;
|
|
dma_addr_t td_dma; /* of dummy */
|
|
struct net2280 *dev;
|
|
unsigned long irqs;
|
|
|
|
/* analogous to a host-side qh */
|
|
struct list_head queue;
|
|
const struct usb_endpoint_descriptor *desc;
|
|
unsigned num : 8,
|
|
fifo_size : 12,
|
|
in_fifo_validate : 1,
|
|
out_overflow : 1,
|
|
stopped : 1,
|
|
wedged : 1,
|
|
is_in : 1,
|
|
is_iso : 1,
|
|
responded : 1;
|
|
};
|
|
|
|
static inline void allow_status (struct net2280_ep *ep)
|
|
{
|
|
/* ep0 only */
|
|
writel ( (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
|
|
| (1 << CLEAR_NAK_OUT_PACKETS)
|
|
| (1 << CLEAR_NAK_OUT_PACKETS_MODE)
|
|
, &ep->regs->ep_rsp);
|
|
ep->stopped = 1;
|
|
}
|
|
|
|
/* count (<= 4) bytes in the next fifo write will be valid */
|
|
static inline void set_fifo_bytecount (struct net2280_ep *ep, unsigned count)
|
|
{
|
|
writeb (count, 2 + (u8 __iomem *) &ep->regs->ep_cfg);
|
|
}
|
|
|
|
struct net2280_request {
|
|
struct usb_request req;
|
|
struct net2280_dma *td;
|
|
dma_addr_t td_dma;
|
|
struct list_head queue;
|
|
unsigned mapped : 1,
|
|
valid : 1;
|
|
};
|
|
|
|
struct net2280 {
|
|
/* each pci device provides one gadget, several endpoints */
|
|
struct usb_gadget gadget;
|
|
spinlock_t lock;
|
|
struct net2280_ep ep [7];
|
|
struct usb_gadget_driver *driver;
|
|
unsigned enabled : 1,
|
|
protocol_stall : 1,
|
|
softconnect : 1,
|
|
got_irq : 1,
|
|
region : 1;
|
|
u16 chiprev;
|
|
|
|
/* pci state used to access those endpoints */
|
|
struct pci_dev *pdev;
|
|
struct net2280_regs __iomem *regs;
|
|
struct net2280_usb_regs __iomem *usb;
|
|
struct net2280_pci_regs __iomem *pci;
|
|
struct net2280_dma_regs __iomem *dma;
|
|
struct net2280_dep_regs __iomem *dep;
|
|
struct net2280_ep_regs __iomem *epregs;
|
|
|
|
struct pci_pool *requests;
|
|
// statistics...
|
|
};
|
|
|
|
static inline void set_halt (struct net2280_ep *ep)
|
|
{
|
|
/* ep0 and bulk/intr endpoints */
|
|
writel ( (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
|
|
/* set NAK_OUT for erratum 0114 */
|
|
| ((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS)
|
|
| (1 << SET_ENDPOINT_HALT)
|
|
, &ep->regs->ep_rsp);
|
|
}
|
|
|
|
static inline void clear_halt (struct net2280_ep *ep)
|
|
{
|
|
/* ep0 and bulk/intr endpoints */
|
|
writel ( (1 << CLEAR_ENDPOINT_HALT)
|
|
| (1 << CLEAR_ENDPOINT_TOGGLE)
|
|
/* unless the gadget driver left a short packet in the
|
|
* fifo, this reverses the erratum 0114 workaround.
|
|
*/
|
|
| ((ep->dev->chiprev == CHIPREV_1) << CLEAR_NAK_OUT_PACKETS)
|
|
, &ep->regs->ep_rsp);
|
|
}
|
|
|
|
#ifdef USE_RDK_LEDS
|
|
|
|
static inline void net2280_led_init (struct net2280 *dev)
|
|
{
|
|
/* LED3 (green) is on during USB activity. note erratum 0113. */
|
|
writel ((1 << GPIO3_LED_SELECT)
|
|
| (1 << GPIO3_OUTPUT_ENABLE)
|
|
| (1 << GPIO2_OUTPUT_ENABLE)
|
|
| (1 << GPIO1_OUTPUT_ENABLE)
|
|
| (1 << GPIO0_OUTPUT_ENABLE)
|
|
, &dev->regs->gpioctl);
|
|
}
|
|
|
|
/* indicate speed with bi-color LED 0/1 */
|
|
static inline
|
|
void net2280_led_speed (struct net2280 *dev, enum usb_device_speed speed)
|
|
{
|
|
u32 val = readl (&dev->regs->gpioctl);
|
|
switch (speed) {
|
|
case USB_SPEED_HIGH: /* green */
|
|
val &= ~(1 << GPIO0_DATA);
|
|
val |= (1 << GPIO1_DATA);
|
|
break;
|
|
case USB_SPEED_FULL: /* red */
|
|
val &= ~(1 << GPIO1_DATA);
|
|
val |= (1 << GPIO0_DATA);
|
|
break;
|
|
default: /* (off/black) */
|
|
val &= ~((1 << GPIO1_DATA) | (1 << GPIO0_DATA));
|
|
break;
|
|
}
|
|
writel (val, &dev->regs->gpioctl);
|
|
}
|
|
|
|
/* indicate power with LED 2 */
|
|
static inline void net2280_led_active (struct net2280 *dev, int is_active)
|
|
{
|
|
u32 val = readl (&dev->regs->gpioctl);
|
|
|
|
// FIXME this LED never seems to turn on.
|
|
if (is_active)
|
|
val |= GPIO2_DATA;
|
|
else
|
|
val &= ~GPIO2_DATA;
|
|
writel (val, &dev->regs->gpioctl);
|
|
}
|
|
static inline void net2280_led_shutdown (struct net2280 *dev)
|
|
{
|
|
/* turn off all four GPIO*_DATA bits */
|
|
writel (readl (&dev->regs->gpioctl) & ~0x0f,
|
|
&dev->regs->gpioctl);
|
|
}
|
|
|
|
#else
|
|
|
|
#define net2280_led_init(dev) do { } while (0)
|
|
#define net2280_led_speed(dev, speed) do { } while (0)
|
|
#define net2280_led_shutdown(dev) do { } while (0)
|
|
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#define xprintk(dev,level,fmt,args...) \
|
|
printk(level "%s %s: " fmt , driver_name , \
|
|
pci_name(dev->pdev) , ## args)
|
|
|
|
#ifdef DEBUG
|
|
#undef DEBUG
|
|
#define DEBUG(dev,fmt,args...) \
|
|
xprintk(dev , KERN_DEBUG , fmt , ## args)
|
|
#else
|
|
#define DEBUG(dev,fmt,args...) \
|
|
do { } while (0)
|
|
#endif /* DEBUG */
|
|
|
|
#ifdef VERBOSE
|
|
#define VDEBUG DEBUG
|
|
#else
|
|
#define VDEBUG(dev,fmt,args...) \
|
|
do { } while (0)
|
|
#endif /* VERBOSE */
|
|
|
|
#define ERROR(dev,fmt,args...) \
|
|
xprintk(dev , KERN_ERR , fmt , ## args)
|
|
#define WARNING(dev,fmt,args...) \
|
|
xprintk(dev , KERN_WARNING , fmt , ## args)
|
|
#define INFO(dev,fmt,args...) \
|
|
xprintk(dev , KERN_INFO , fmt , ## args)
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static inline void start_out_naking (struct net2280_ep *ep)
|
|
{
|
|
/* NOTE: hardware races lurk here, and PING protocol issues */
|
|
writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
|
|
/* synch with device */
|
|
readl (&ep->regs->ep_rsp);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static inline void assert_out_naking (struct net2280_ep *ep, const char *where)
|
|
{
|
|
u32 tmp = readl (&ep->regs->ep_stat);
|
|
|
|
if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) {
|
|
DEBUG (ep->dev, "%s %s %08x !NAK\n",
|
|
ep->ep.name, where, tmp);
|
|
writel ((1 << SET_NAK_OUT_PACKETS),
|
|
&ep->regs->ep_rsp);
|
|
}
|
|
}
|
|
#define ASSERT_OUT_NAKING(ep) assert_out_naking(ep,__func__)
|
|
#else
|
|
#define ASSERT_OUT_NAKING(ep) do {} while (0)
|
|
#endif
|
|
|
|
static inline void stop_out_naking (struct net2280_ep *ep)
|
|
{
|
|
u32 tmp;
|
|
|
|
tmp = readl (&ep->regs->ep_stat);
|
|
if ((tmp & (1 << NAK_OUT_PACKETS)) != 0)
|
|
writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|