// SPDX-License-Identifier: GPL-2.0+
/*
* PLX NET2272 high/full speed USB device controller
*
* Copyright (C) 2005-2006 PLX Technology, Inc.
* Copyright (C) 2006-2011 Analog Devices, Inc.
*/
#ifndef __NET2272_H__
#define __NET2272_H__
/* Main Registers */
#define REGADDRPTR 0x00
#define REGDATA 0x01
#define IRQSTAT0 0x02
#define ENDPOINT_0_INTERRUPT 0
#define ENDPOINT_A_INTERRUPT 1
#define ENDPOINT_B_INTERRUPT 2
#define ENDPOINT_C_INTERRUPT 3
#define VIRTUALIZED_ENDPOINT_INTERRUPT 4
#define SETUP_PACKET_INTERRUPT 5
#define DMA_DONE_INTERRUPT 6
#define SOF_INTERRUPT 7
#define IRQSTAT1 0x03
#define CONTROL_STATUS_INTERRUPT 1
#define VBUS_INTERRUPT 2
#define SUSPEND_REQUEST_INTERRUPT 3
#define SUSPEND_REQUEST_CHANGE_INTERRUPT 4
#define RESUME_INTERRUPT 5
#define ROOT_PORT_RESET_INTERRUPT 6
#define RESET_STATUS 7
#define PAGESEL 0x04
#define DMAREQ 0x1c
#define DMA_ENDPOINT_SELECT 0
#define DREQ_POLARITY 1
#define DACK_POLARITY 2
#define EOT_POLARITY 3
#define DMA_CONTROL_DACK 4
#define DMA_REQUEST_ENABLE 5
#define DMA_REQUEST 6
#define DMA_BUFFER_VALID 7
#define SCRATCH 0x1d
#define IRQENB0 0x20
#define ENDPOINT_0_INTERRUPT_ENABLE 0
#define ENDPOINT_A_INTERRUPT_ENABLE 1
#define ENDPOINT_B_INTERRUPT_ENABLE 2
#define ENDPOINT_C_INTERRUPT_ENABLE 3
#define VIRTUALIZED_ENDPOINT_INTERRUPT_ENABLE 4
#define SETUP_PACKET_INTERRUPT_ENABLE 5
#define DMA_DONE_INTERRUPT_ENABLE 6
#define SOF_INTERRUPT_ENABLE 7
#define IRQENB1 0x21
#define VBUS_INTERRUPT_ENABLE 2
#define SUSPEND_REQUEST_INTERRUPT_ENABLE 3
#define SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE 4
#define RESUME_INTERRUPT_ENABLE 5
#define ROOT_PORT_RESET_INTERRUPT_ENABLE 6
#define LOCCTL 0x22
#define DATA_WIDTH 0
#define LOCAL_CLOCK_OUTPUT 1
#define LOCAL_CLOCK_OUTPUT_OFF 0
#define LOCAL_CLOCK_OUTPUT_3_75MHZ 1
#define LOCAL_CLOCK_OUTPUT_7_5MHZ 2
#define LOCAL_CLOCK_OUTPUT_15MHZ 3
#define LOCAL_CLOCK_OUTPUT_30MHZ 4
#define LOCAL_CLOCK_OUTPUT_60MHZ 5
#define DMA_SPLIT_BUS_MODE 4
#define BYTE_SWAP 5
#define BUFFER_CONFIGURATION 6
#define BUFFER_CONFIGURATION_EPA512_EPB512 0
#define BUFFER_CONFIGURATION_EPA1024_EPB512 1
#define BUFFER_CONFIGURATION_EPA1024_EPB1024 2
#define BUFFER_CONFIGURATION_EPA1024DB 3
#define CHIPREV_LEGACY 0x23
#define NET2270_LEGACY_REV 0x40
#define LOCCTL1 0x24
#define DMA_MODE 0
#define SLOW_DREQ 0
#define FAST_DREQ 1
#define BURST_MODE 2
#define DMA_DACK_ENABLE 2
#define CHIPREV_2272 0x25
#define CHIPREV_NET2272_R1 0x10
#define CHIPREV_NET2272_R1A 0x11
/* USB Registers */
#define USBCTL0 0x18
#define IO_WAKEUP_ENABLE 1
#define USB_DETECT_ENABLE 3
#define USB_ROOT_PORT_WAKEUP_ENABLE 5
#define USBCTL1 0x19
#define VBUS_PIN 0
#define USB_FULL_SPEED 1
#define USB_HIGH_SPEED 2
#define GENERATE_RESUME 3
#define VIRTUAL_ENDPOINT_ENABLE 4
#define FRAME0 0x1a
#define FRAME1 0x1b
#define OURADDR 0x30
#define FORCE_IMMEDIATE 7
#define USBDIAG 0x31
#define FORCE_TRANSMIT_CRC_ERROR 0
#define PREVENT_TRANSMIT_BIT_STUFF 1
#define FORCE_RECEIVE_ERROR 2
#define FAST_TIMES 4
#define USBTEST 0x32
#define TEST_MODE_SELECT 0
#define NORMAL_OPERATION 0
#define XCVRDIAG 0x33
#define FORCE_FULL_SPEED 2
#define FORCE_HIGH_SPEED 3
#define OPMODE 4
#define NORMAL_OPERATION 0
#define NON_DRIVING 1
#define DISABLE_BITSTUFF_AND_NRZI_ENCODE 2
#define LINESTATE 6
#define SE0_STATE 0
#define J_STATE 1
#define K_STATE 2
#define SE1_STATE 3
#define VIRTOUT0 0x34
#define VIRTOUT1 0x35
#define VIRTIN0 0x36
#define VIRTIN1 0x37
#define SETUP0 0x40
#define SETUP1 0x41
#define SETUP2 0x42
#define SETUP3 0x43
#define SETUP4 0x44
#define SETUP5 0x45
#define SETUP6 0x46
#define SETUP7 0x47
/* Endpoint Registers (Paged via PAGESEL) */
#define EP_DATA 0x05
#define EP_STAT0 0x06
#define DATA_IN_TOKEN_INTERRUPT 0
#define DATA_OUT_TOKEN_INTERRUPT 1
#define DATA_PACKET_TRANSMITTED_INTERRUPT 2
#define DATA_PACKET_RECEIVED_INTERRUPT 3
#define SHORT_PACKET_TRANSFERRED_INTERRUPT 4
#define NAK_OUT_PACKETS 5
#define BUFFER_EMPTY 6
#define BUFFER_FULL 7
#define EP_STAT1 0x07
#define TIMEOUT 0
#define USB_OUT_ACK_SENT 1
#define USB_OUT_NAK_SENT 2
#define USB_IN_ACK_RCVD 3
#define USB_IN_NAK_SENT 4
#define USB_STALL_SENT 5
#define LOCAL_OUT_ZLP 6
#define BUFFER_FLUSH 7
#define EP_TRANSFER0 0x08
#define EP_TRANSFER1 0x09
#define EP_TRANSFER2 0x0a
#define EP_IRQENB 0x0b
#define DATA_IN_TOKEN_INTERRUPT_ENABLE 0
#define DATA_OUT_TOKEN_INTERRUPT_ENABLE 1
#define DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE 2
#define DATA_PACKET_RECEIVED_INTERRUPT_ENABLE 3
#define SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE 4
#define EP_AVAIL0 0x0c
#define EP_AVAIL1 0x0d
#define EP_RSPCLR 0x0e
#define EP_RSPSET 0x0f
#define ENDPOINT_HALT 0
#define ENDPOINT_TOGGLE 1
#define NAK_OUT_PACKETS_MODE 2
#define CONTROL_STATUS_PHASE_HANDSHAKE 3
#define INTERRUPT_MODE 4
#define AUTOVALIDATE 5
#define HIDE_STATUS_PHASE 6
#define ALT_NAK_OUT_PACKETS 7
#define EP_MAXPKT0 0x28
#define EP_MAXPKT1 0x29
#define ADDITIONAL_TRANSACTION_OPPORTUNITIES 3
#define NONE_ADDITIONAL_TRANSACTION 0
#define ONE_ADDITIONAL_TRANSACTION 1
#define TWO_ADDITIONAL_TRANSACTION 2
#define EP_CFG 0x2a
#define ENDPOINT_NUMBER 0
#define ENDPOINT_DIRECTION 4
#define ENDPOINT_TYPE 5
#define ENDPOINT_ENABLE 7
#define EP_HBW 0x2b
#define HIGH_BANDWIDTH_OUT_TRANSACTION_PID 0
#define DATA0_PID 0
#define DATA1_PID 1
#define DATA2_PID 2
#define MDATA_PID 3
#define EP_BUFF_STATES 0x2c
#define BUFFER_A_STATE 0
#define BUFFER_B_STATE 2
#define BUFF_FREE 0
#define BUFF_VALID 1
#define BUFF_LCL 2
#define BUFF_USB 3
/*---------------------------------------------------------------------------*/
#define PCI_DEVICE_ID_RDK1 0x9054
/* PCI-RDK EPLD Registers */
#define RDK_EPLD_IO_REGISTER1 0x00000000
#define RDK_EPLD_USB_RESET 0
#define RDK_EPLD_USB_POWERDOWN 1
#define RDK_EPLD_USB_WAKEUP 2
#define RDK_EPLD_USB_EOT 3
#define RDK_EPLD_DPPULL 4
#define RDK_EPLD_IO_REGISTER2 0x00000004
#define RDK_EPLD_BUSWIDTH 0
#define RDK_EPLD_USER 2
#define RDK_EPLD_RESET_INTERRUPT_ENABLE 3
#define RDK_EPLD_DMA_TIMEOUT_ENABLE 4
#define RDK_EPLD_STATUS_REGISTER 0x00000008
#define RDK_EPLD_USB_LRESET 0
#define RDK_EPLD_REVISION_REGISTER 0x0000000c
/* PCI-RDK PLX 9054 Registers */
#define INTCSR 0x68
#define PCI_INTERRUPT_ENABLE 8
#define LOCAL_INTERRUPT_INPUT_ENABLE 11
#define LOCAL_INPUT_INTERRUPT_ACTIVE 15
#define LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE 18
#define LOCAL_DMA_CHANNEL_1_INTERRUPT_ENABLE 19
#define DMA_CHANNEL_0_INTERRUPT_ACTIVE 21
#define DMA_CHANNEL_1_INTERRUPT_ACTIVE 22
#define CNTRL 0x6C
#define RELOAD_CONFIGURATION_REGISTERS 29
#define PCI_ADAPTER_SOFTWARE_RESET 30
#define DMAMODE0 0x80
#define LOCAL_BUS_WIDTH 0
#define INTERNAL_WAIT_STATES 2
#define TA_READY_INPUT_ENABLE 6
#define LOCAL_BURST_ENABLE 8
#define SCATTER_GATHER_MODE 9
#define DONE_INTERRUPT_ENABLE 10
#define LOCAL_ADDRESSING_MODE 11
#define DEMAND_MODE 12
#define DMA_EOT_ENABLE 14
#define FAST_SLOW_TERMINATE_MODE_SELECT 15
#define DMA_CHANNEL_INTERRUPT_SELECT 17
#define DMAPADR0 0x84
#define DMALADR0 0x88
#define DMASIZ0 0x8c
#define DMADPR0 0x90
#define DESCRIPTOR_LOCATION 0
#define END_OF_CHAIN 1
#define INTERRUPT_AFTER_TERMINAL_COUNT 2
#define DIRECTION_OF_TRANSFER 3
#define DMACSR0 0xa8
#define CHANNEL_ENABLE 0
#define CHANNEL_START 1
#define CHANNEL_ABORT 2
#define CHANNEL_CLEAR_INTERRUPT 3
#define CHANNEL_DONE 4
#define DMATHR 0xb0
#define LBRD1 0xf8
#define MEMORY_SPACE_LOCAL_BUS_WIDTH 0
#define W8_BIT 0
#define W16_BIT 1
/* Special OR'ing of INTCSR bits */
#define LOCAL_INTERRUPT_TEST \
((1 << LOCAL_INPUT_INTERRUPT_ACTIVE) | \
(1 << LOCAL_INTERRUPT_INPUT_ENABLE))
#define DMA_CHANNEL_0_TEST \
((1 << DMA_CHANNEL_0_INTERRUPT_ACTIVE) | \
(1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE))
#define DMA_CHANNEL_1_TEST \
((1 << DMA_CHANNEL_1_INTERRUPT_ACTIVE) | \
(1 << LOCAL_DMA_CHANNEL_1_INTERRUPT_ENABLE))
/* EPLD Registers */
#define RDK_EPLD_IO_REGISTER1 0x00000000
#define RDK_EPLD_USB_RESET 0
#define RDK_EPLD_USB_POWERDOWN 1
#define RDK_EPLD_USB_WAKEUP 2
#define RDK_EPLD_USB_EOT 3
#define RDK_EPLD_DPPULL 4
#define RDK_EPLD_IO_REGISTER2 0x00000004
#define RDK_EPLD_BUSWIDTH 0
#define RDK_EPLD_USER 2
#define RDK_EPLD_RESET_INTERRUPT_ENABLE 3
#define RDK_EPLD_DMA_TIMEOUT_ENABLE 4
#define RDK_EPLD_STATUS_REGISTER 0x00000008
#define RDK_EPLD_USB_LRESET 0
#define RDK_EPLD_REVISION_REGISTER 0x0000000c
#define EPLD_IO_CONTROL_REGISTER 0x400
#define NET2272_RESET 0
#define BUSWIDTH 1
#define MPX_MODE 3
#define USER 4
#define DMA_TIMEOUT_ENABLE 5
#define DMA_CTL_DACK 6
#define EPLD_DMA_ENABLE 7
#define EPLD_DMA_CONTROL_REGISTER 0x800
#define SPLIT_DMA_MODE 0
#define SPLIT_DMA_DIRECTION 1
#define SPLIT_DMA_ENABLE 2
#define SPLIT_DMA_INTERRUPT_ENABLE 3
#define SPLIT_DMA_INTERRUPT 4
#define EPLD_DMA_MODE 5
#define EPLD_DMA_CONTROLLER_ENABLE 7
#define SPLIT_DMA_ADDRESS_LOW 0xc00
#define SPLIT_DMA_ADDRESS_HIGH 0x1000
#define SPLIT_DMA_BYTE_COUNT_LOW 0x1400
#define SPLIT_DMA_BYTE_COUNT_HIGH 0x1800
#define EPLD_REVISION_REGISTER 0x1c00
#define SPLIT_DMA_RAM 0x4000
#define DMA_RAM_SIZE 0x1000
/*---------------------------------------------------------------------------*/
#define PCI_DEVICE_ID_RDK2 0x3272
/* PCI-RDK version 2 registers */
/* Main Control Registers */
#define RDK2_IRQENB 0x00
#define RDK2_IRQSTAT 0x04
#define PB7 23
#define PB6 22
#define PB5 21
#define PB4 20
#define PB3 19
#define PB2 18
#define PB1 17
#define PB0 16
#define GP3 23
#define GP2 23
#define GP1 23
#define GP0 23
#define DMA_RETRY_ABORT 6
#define DMA_PAUSE_DONE 5
#define DMA_ABORT_DONE 4
#define DMA_OUT_FIFO_TRANSFER_DONE 3
#define DMA_LOCAL_DONE 2
#define DMA_PCI_DONE 1
#define NET2272_PCI_IRQ 0
#define RDK2_LOCCTLRDK 0x08
#define CHIP_RESET 3
#define SPLIT_DMA 2
#define MULTIPLEX_MODE 1
#define BUS_WIDTH 0
#define RDK2_GPIOCTL 0x10
#define GP3_OUT_ENABLE 7
#define GP2_OUT_ENABLE 6
#define GP1_OUT_ENABLE 5
#define GP0_OUT_ENABLE 4
#define GP3_DATA 3
#define GP2_DATA 2
#define GP1_DATA 1
#define GP0_DATA 0
#define RDK2_LEDSW 0x14
#define LED3 27
#define LED2 26
#define LED1 25
#define LED0 24
#define PBUTTON 16
#define DIPSW 0
#define RDK2_DIAG 0x18
#define RDK2_FAST_TIMES 2
#define FORCE_PCI_SERR 1
#define FORCE_PCI_INT 0
#define RDK2_FPGAREV 0x1C
/* Dma Control registers */
#define RDK2_DMACTL 0x80
#define ADDR_HOLD 24
#define RETRY_COUNT 16 /* 23:16 */
#define FIFO_THRESHOLD 11 /* 15:11 */
#define MEM_WRITE_INVALIDATE 10
#define READ_MULTIPLE 9
#define READ_LINE 8
#define RDK2_DMA_MODE 6 /* 7:6 */
#define CONTROL_DACK 5
#define EOT_ENABLE 4
#define EOT_POLARITY 3
#define DACK_POLARITY 2
#define DREQ_POLARITY 1
#define DMA_ENABLE 0
#define RDK2_DMASTAT 0x84
#define GATHER_COUNT 12 /* 14:12 */
#define FIFO_COUNT 6 /* 11:6 */
#define FIFO_FLUSH 5
#define FIFO_TRANSFER 4
#define PAUSE_DONE 3
#define ABORT_DONE 2
#define DMA_ABORT 1
#define DMA_START 0
#define RDK2_DMAPCICOUNT 0x88
#define DMA_DIRECTION 31
#define DMA_PCI_BYTE_COUNT 0 /* 0:23 */
#define RDK2_DMALOCCOUNT 0x8C /* 0:23 dma local byte count */
#define RDK2_DMAADDR 0x90 /* 2:31 PCI bus starting address */
/*---------------------------------------------------------------------------*/
#define REG_INDEXED_THRESHOLD (1 << 5)
/* DRIVER DATA STRUCTURES and UTILITIES */
struct net2272_ep {
struct usb_ep ep;
struct net2272 *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,
stopped:1,
wedged:1,
is_in:1,
is_iso:1,
dma:1,
not_empty:1;
};
struct net2272 {
/* each device provides one gadget, several endpoints */
struct usb_gadget gadget;
struct device *dev;
unsigned short dev_id;
spinlock_t lock;
struct net2272_ep ep[4];
struct usb_gadget_driver *driver;
unsigned protocol_stall:1,
softconnect:1,
wakeup:1,
added:1,
async_callbacks:1,
dma_eot_polarity:1,
dma_dack_polarity:1,
dma_dreq_polarity:1,
dma_busy:1;
u16 chiprev;
u8 pagesel;
unsigned int irq;
unsigned short fifo_mode;
unsigned int base_shift;
u16 __iomem *base_addr;
union {
#ifdef CONFIG_USB_PCI
struct {
void __iomem *plx9054_base_addr;
void __iomem *epld_base_addr;
} rdk1;
struct {
/* Bar0, Bar1 is base_addr both mem-mapped */
void __iomem *fpga_base_addr;
} rdk2;
#endif
};
};
static void __iomem *
net2272_reg_addr(struct net2272 *dev, unsigned int reg)
{
return dev->base_addr + (reg << dev->base_shift);
}
static void
net2272_write(struct net2272 *dev, unsigned int reg, u8 value)
{
if (reg >= REG_INDEXED_THRESHOLD) {
/*
* Indexed register; use REGADDRPTR/REGDATA
* - Save and restore REGADDRPTR. This prevents REGADDRPTR from
* changes between other code sections, but it is time consuming.
* - Performance tips: either do not save and restore REGADDRPTR (if it
* is safe) or do save/restore operations only in critical sections.
u8 tmp = readb(dev->base_addr + REGADDRPTR);
*/
writeb((u8)reg, net2272_reg_addr(dev, REGADDRPTR));
writeb(value, net2272_reg_addr(dev, REGDATA));
/* writeb(tmp, net2272_reg_addr(dev, REGADDRPTR)); */
} else
writeb(value, net2272_reg_addr(dev, reg));
}
static u8
net2272_read(struct net2272 *dev, unsigned int reg)
{
u8 ret;
if (reg >= REG_INDEXED_THRESHOLD) {
/*
* Indexed register; use REGADDRPTR/REGDATA
* - Save and restore REGADDRPTR. This prevents REGADDRPTR from
* changes between other code sections, but it is time consuming.
* - Performance tips: either do not save and restore REGADDRPTR (if it
* is safe) or do save/restore operations only in critical sections.
u8 tmp = readb(dev->base_addr + REGADDRPTR);
*/
writeb((u8)reg, net2272_reg_addr(dev, REGADDRPTR));
ret = readb(net2272_reg_addr(dev, REGDATA));
/* writeb(tmp, net2272_reg_addr(dev, REGADDRPTR)); */
} else
ret = readb(net2272_reg_addr(dev, reg));
return ret;
}
static void
net2272_ep_write(struct net2272_ep *ep, unsigned int reg, u8 value)
{
struct net2272 *dev = ep->dev;
if (dev->pagesel != ep->num) {
net2272_write(dev, PAGESEL, ep->num);
dev->pagesel = ep->num;
}
net2272_write(dev, reg, value);
}
static u8
net2272_ep_read(struct net2272_ep *ep, unsigned int reg)
{
struct net2272 *dev = ep->dev;
if (dev->pagesel != ep->num) {
net2272_write(dev, PAGESEL, ep->num);
dev->pagesel = ep->num;
}
return net2272_read(dev, reg);
}
static void allow_status(struct net2272_ep *ep)
{
/* ep0 only */
net2272_ep_write(ep, EP_RSPCLR,
(1 << CONTROL_STATUS_PHASE_HANDSHAKE) |
(1 << ALT_NAK_OUT_PACKETS) |
(1 << NAK_OUT_PACKETS_MODE));
ep->stopped = 1;
}
static void set_halt(struct net2272_ep *ep)
{
/* ep0 and bulk/intr endpoints */
net2272_ep_write(ep, EP_RSPCLR, 1 << CONTROL_STATUS_PHASE_HANDSHAKE);
net2272_ep_write(ep, EP_RSPSET, 1 << ENDPOINT_HALT);
}
static void clear_halt(struct net2272_ep *ep)
{
/* ep0 and bulk/intr endpoints */
net2272_ep_write(ep, EP_RSPCLR,
(1 << ENDPOINT_HALT) | (1 << ENDPOINT_TOGGLE));
}
/* count (<= 4) bytes in the next fifo write will be valid */
static void set_fifo_bytecount(struct net2272_ep *ep, unsigned count)
{
/* net2272_ep_write will truncate to u8 for us */
net2272_ep_write(ep, EP_TRANSFER2, count >> 16);
net2272_ep_write(ep, EP_TRANSFER1, count >> 8);
net2272_ep_write(ep, EP_TRANSFER0, count);
}
struct net2272_request {
struct usb_request req;
struct list_head queue;
unsigned mapped:1,
valid:1;
};
#endif
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