fb2a85dd93
Remove fiforegs from struct net2280 and net2280_ep as it is unused. By the way, ep->fiforegs = &dev->fiforegs[i] assignment is incorrect. It should be ep->fiforegs = &dev->fiforegs[ne[i]], but it doesn't matter now. Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
384 lines
11 KiB
C
384 lines
11 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
|
|
* Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/usb/net2280.h>
|
|
#include <linux/usb/usb338x.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 PCI_VENDOR_ID_PLX_LEGACY 0x17cc
|
|
|
|
#define PLX_LEGACY BIT(0)
|
|
#define PLX_2280 BIT(1)
|
|
#define PLX_SUPERSPEED BIT(2)
|
|
|
|
#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
|
|
|
|
/* DEFECT 7374 */
|
|
#define DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS 200
|
|
#define DEFECT_7374_PROCESSOR_WAIT_TIME 10
|
|
|
|
/* ep0 max packet size */
|
|
#define EP0_SS_MAX_PACKET_SIZE 0x200
|
|
#define EP0_HS_MAX_PACKET_SIZE 0x40
|
|
#ifdef __KERNEL__
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* [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;
|
|
} __aligned(16);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* DRIVER DATA STRUCTURES and UTILITIES */
|
|
|
|
struct net2280_ep {
|
|
struct usb_ep ep;
|
|
struct net2280_ep_regs __iomem *cfg;
|
|
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(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) |
|
|
BIT(CLEAR_NAK_OUT_PACKETS) |
|
|
BIT(CLEAR_NAK_OUT_PACKETS_MODE),
|
|
&ep->regs->ep_rsp);
|
|
ep->stopped = 1;
|
|
}
|
|
|
|
static inline void allow_status_338x(struct net2280_ep *ep)
|
|
{
|
|
/*
|
|
* Control Status Phase Handshake was set by the chip when the setup
|
|
* packet arrived. While set, the chip automatically NAKs the host's
|
|
* Status Phase tokens.
|
|
*/
|
|
writel(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), &ep->regs->ep_rsp);
|
|
|
|
ep->stopped = 1;
|
|
|
|
/* TD 9.9 Halt Endpoint test. TD 9.22 set feature test. */
|
|
ep->responded = 0;
|
|
}
|
|
|
|
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[9];
|
|
struct usb_gadget_driver *driver;
|
|
unsigned enabled : 1,
|
|
protocol_stall : 1,
|
|
softconnect : 1,
|
|
got_irq : 1,
|
|
region:1,
|
|
u1_enable:1,
|
|
u2_enable:1,
|
|
ltm_enable:1,
|
|
wakeup_enable:1,
|
|
addressed_state:1,
|
|
bug7734_patched:1;
|
|
u16 chiprev;
|
|
int enhanced_mode;
|
|
int n_ep;
|
|
kernel_ulong_t quirks;
|
|
|
|
|
|
/* pci state used to access those endpoints */
|
|
struct pci_dev *pdev;
|
|
struct net2280_regs __iomem *regs;
|
|
struct net2280_usb_regs __iomem *usb;
|
|
struct usb338x_usb_ext_regs __iomem *usb_ext;
|
|
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 usb338x_ll_regs __iomem *llregs;
|
|
struct usb338x_ll_lfps_regs __iomem *ll_lfps_regs;
|
|
struct usb338x_ll_tsn_regs __iomem *ll_tsn_regs;
|
|
struct usb338x_ll_chi_regs __iomem *ll_chicken_reg;
|
|
struct usb338x_pl_regs __iomem *plregs;
|
|
|
|
struct pci_pool *requests;
|
|
/* statistics...*/
|
|
};
|
|
|
|
static inline void set_halt(struct net2280_ep *ep)
|
|
{
|
|
/* ep0 and bulk/intr endpoints */
|
|
writel(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) |
|
|
/* set NAK_OUT for erratum 0114 */
|
|
((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS) |
|
|
BIT(SET_ENDPOINT_HALT),
|
|
&ep->regs->ep_rsp);
|
|
}
|
|
|
|
static inline void clear_halt(struct net2280_ep *ep)
|
|
{
|
|
/* ep0 and bulk/intr endpoints */
|
|
writel(BIT(CLEAR_ENDPOINT_HALT) |
|
|
BIT(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);
|
|
}
|
|
|
|
/*
|
|
* FSM value for Defect 7374 (U1U2 Test) is managed in
|
|
* chip's SCRATCH register:
|
|
*/
|
|
#define DEFECT7374_FSM_FIELD 28
|
|
|
|
/* Waiting for Control Read:
|
|
* - A transition to this state indicates a fresh USB connection,
|
|
* before the first Setup Packet. The connection speed is not
|
|
* known. Firmware is waiting for the first Control Read.
|
|
* - Starting state: This state can be thought of as the FSM's typical
|
|
* starting state.
|
|
* - Tip: Upon the first SS Control Read the FSM never
|
|
* returns to this state.
|
|
*/
|
|
#define DEFECT7374_FSM_WAITING_FOR_CONTROL_READ BIT(DEFECT7374_FSM_FIELD)
|
|
|
|
/* Non-SS Control Read:
|
|
* - A transition to this state indicates detection of the first HS
|
|
* or FS Control Read.
|
|
* - Tip: Upon the first SS Control Read the FSM never
|
|
* returns to this state.
|
|
*/
|
|
#define DEFECT7374_FSM_NON_SS_CONTROL_READ (2 << DEFECT7374_FSM_FIELD)
|
|
|
|
/* SS Control Read:
|
|
* - A transition to this state indicates detection of the
|
|
* first SS Control Read.
|
|
* - This state indicates workaround completion. Workarounds no longer
|
|
* need to be applied (as long as the chip remains powered up).
|
|
* - Tip: Once in this state the FSM state does not change (until
|
|
* the chip's power is lost and restored).
|
|
* - This can be thought of as the final state of the FSM;
|
|
* the FSM 'locks-up' in this state until the chip loses power.
|
|
*/
|
|
#define DEFECT7374_FSM_SS_CONTROL_READ (3 << DEFECT7374_FSM_FIELD)
|
|
|
|
#ifdef USE_RDK_LEDS
|
|
|
|
static inline void net2280_led_init(struct net2280 *dev)
|
|
{
|
|
/* LED3 (green) is on during USB activity. note erratum 0113. */
|
|
writel(BIT(GPIO3_LED_SELECT) |
|
|
BIT(GPIO3_OUTPUT_ENABLE) |
|
|
BIT(GPIO2_OUTPUT_ENABLE) |
|
|
BIT(GPIO1_OUTPUT_ENABLE) |
|
|
BIT(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_SUPER: /* green + red */
|
|
val |= BIT(GPIO0_DATA) | BIT(GPIO1_DATA);
|
|
break;
|
|
case USB_SPEED_HIGH: /* green */
|
|
val &= ~BIT(GPIO0_DATA);
|
|
val |= BIT(GPIO1_DATA);
|
|
break;
|
|
case USB_SPEED_FULL: /* red */
|
|
val &= ~BIT(GPIO1_DATA);
|
|
val |= BIT(GPIO0_DATA);
|
|
break;
|
|
default: /* (off/black) */
|
|
val &= ~(BIT(GPIO1_DATA) | BIT(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 ep_dbg(ndev, fmt, args...) \
|
|
dev_dbg((&((ndev)->pdev->dev)), fmt, ##args)
|
|
|
|
#define ep_vdbg(ndev, fmt, args...) \
|
|
dev_vdbg((&((ndev)->pdev->dev)), fmt, ##args)
|
|
|
|
#define ep_info(ndev, fmt, args...) \
|
|
dev_info((&((ndev)->pdev->dev)), fmt, ##args)
|
|
|
|
#define ep_warn(ndev, fmt, args...) \
|
|
dev_warn((&((ndev)->pdev->dev)), fmt, ##args)
|
|
|
|
#define ep_err(ndev, fmt, args...) \
|
|
dev_err((&((ndev)->pdev->dev)), fmt, ##args)
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static inline void set_fifo_bytecount(struct net2280_ep *ep, unsigned count)
|
|
{
|
|
if (ep->dev->pdev->vendor == 0x17cc)
|
|
writeb(count, 2 + (u8 __iomem *) &ep->regs->ep_cfg);
|
|
else{
|
|
u32 tmp = readl(&ep->cfg->ep_cfg) &
|
|
(~(0x07 << EP_FIFO_BYTE_COUNT));
|
|
writel(tmp | (count << EP_FIFO_BYTE_COUNT), &ep->cfg->ep_cfg);
|
|
}
|
|
}
|
|
|
|
static inline void start_out_naking(struct net2280_ep *ep)
|
|
{
|
|
/* NOTE: hardware races lurk here, and PING protocol issues */
|
|
writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
|
|
/* synch with device */
|
|
readl(&ep->regs->ep_rsp);
|
|
}
|
|
|
|
static inline void stop_out_naking(struct net2280_ep *ep)
|
|
{
|
|
u32 tmp;
|
|
|
|
tmp = readl(&ep->regs->ep_stat);
|
|
if ((tmp & BIT(NAK_OUT_PACKETS)) != 0)
|
|
writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
|
|
}
|
|
|
|
|
|
static inline void set_max_speed(struct net2280_ep *ep, u32 max)
|
|
{
|
|
u32 reg;
|
|
static const u32 ep_enhanced[9] = { 0x10, 0x60, 0x30, 0x80,
|
|
0x50, 0x20, 0x70, 0x40, 0x90 };
|
|
|
|
if (ep->dev->enhanced_mode)
|
|
reg = ep_enhanced[ep->num];
|
|
else{
|
|
reg = (ep->num + 1) * 0x10;
|
|
if (ep->dev->gadget.speed != USB_SPEED_HIGH)
|
|
reg += 1;
|
|
}
|
|
|
|
set_idx_reg(ep->dev->regs, reg, max);
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|