250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* SL811HS register declarations and HCD data structures
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*
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* Copyright (C) 2004 Psion Teklogix
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* Copyright (C) 2004 David Brownell
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* Copyright (C) 2001 Cypress Semiconductor Inc.
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*/
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/*
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* SL811HS has transfer registers, and control registers. In host/master
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* mode one set of registers is used; in peripheral/slave mode, another.
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* - SL11H only has some "A" transfer registers from 0x00-0x04
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* - SL811HS also has "B" registers from 0x08-0x0c
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* - SL811S (or HS in slave mode) has four A+B sets, at 00, 10, 20, 30
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*/
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#define SL811_EP_A(base) ((base) + 0)
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#define SL811_EP_B(base) ((base) + 8)
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#define SL811_HOST_BUF 0x00
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#define SL811_PERIPH_EP0 0x00
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#define SL811_PERIPH_EP1 0x10
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#define SL811_PERIPH_EP2 0x20
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#define SL811_PERIPH_EP3 0x30
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/* TRANSFER REGISTERS: host and peripheral sides are similar
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* except for the control models (master vs slave).
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*/
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#define SL11H_HOSTCTLREG 0
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# define SL11H_HCTLMASK_ARM 0x01
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# define SL11H_HCTLMASK_ENABLE 0x02
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# define SL11H_HCTLMASK_IN 0x00
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# define SL11H_HCTLMASK_OUT 0x04
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# define SL11H_HCTLMASK_ISOCH 0x10
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# define SL11H_HCTLMASK_AFTERSOF 0x20
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# define SL11H_HCTLMASK_TOGGLE 0x40
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# define SL11H_HCTLMASK_PREAMBLE 0x80
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#define SL11H_BUFADDRREG 1
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#define SL11H_BUFLNTHREG 2
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#define SL11H_PKTSTATREG 3 /* read */
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# define SL11H_STATMASK_ACK 0x01
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# define SL11H_STATMASK_ERROR 0x02
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# define SL11H_STATMASK_TMOUT 0x04
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# define SL11H_STATMASK_SEQ 0x08
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# define SL11H_STATMASK_SETUP 0x10
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# define SL11H_STATMASK_OVF 0x20
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# define SL11H_STATMASK_NAK 0x40
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# define SL11H_STATMASK_STALL 0x80
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#define SL11H_PIDEPREG 3 /* write */
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# define SL_SETUP 0xd0
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# define SL_IN 0x90
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# define SL_OUT 0x10
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# define SL_SOF 0x50
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# define SL_PREAMBLE 0xc0
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# define SL_NAK 0xa0
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# define SL_STALL 0xe0
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# define SL_DATA0 0x30
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# define SL_DATA1 0xb0
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#define SL11H_XFERCNTREG 4 /* read */
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#define SL11H_DEVADDRREG 4 /* write */
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/* CONTROL REGISTERS: host and peripheral are very different.
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*/
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#define SL11H_CTLREG1 5
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# define SL11H_CTL1MASK_SOF_ENA 0x01
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# define SL11H_CTL1MASK_FORCE 0x18
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# define SL11H_CTL1MASK_NORMAL 0x00
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# define SL11H_CTL1MASK_SE0 0x08 /* reset */
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# define SL11H_CTL1MASK_J 0x10
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# define SL11H_CTL1MASK_K 0x18 /* resume */
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# define SL11H_CTL1MASK_LSPD 0x20
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# define SL11H_CTL1MASK_SUSPEND 0x40
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#define SL11H_IRQ_ENABLE 6
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# define SL11H_INTMASK_DONE_A 0x01
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# define SL11H_INTMASK_DONE_B 0x02
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# define SL11H_INTMASK_SOFINTR 0x10
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# define SL11H_INTMASK_INSRMV 0x20 /* to/from SE0 */
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# define SL11H_INTMASK_RD 0x40
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# define SL11H_INTMASK_DP 0x80 /* only in INTSTATREG */
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#define SL11S_ADDRESS 7
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/* 0x08-0x0c are for the B buffer (not in SL11) */
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#define SL11H_IRQ_STATUS 0x0D /* write to ack */
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#define SL11H_HWREVREG 0x0E /* read */
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# define SL11H_HWRMASK_HWREV 0xF0
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#define SL11H_SOFLOWREG 0x0E /* write */
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#define SL11H_SOFTMRREG 0x0F /* read */
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/* a write to this register enables SL811HS features.
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* HOST flag presumably overrides the chip input signal?
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*/
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#define SL811HS_CTLREG2 0x0F
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# define SL811HS_CTL2MASK_SOF_MASK 0x3F
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# define SL811HS_CTL2MASK_DSWAP 0x40
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# define SL811HS_CTL2MASK_HOST 0x80
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#define SL811HS_CTL2_INIT (SL811HS_CTL2MASK_HOST | 0x2e)
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/* DATA BUFFERS: registers from 0x10..0xff are for data buffers;
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* that's 240 bytes, which we'll split evenly between A and B sides.
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* Only ISO can use more than 64 bytes per packet.
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* (The SL11S has 0x40..0xff for buffers.)
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*/
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#define H_MAXPACKET 120 /* bytes in A or B fifos */
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#define SL11H_DATA_START 0x10
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#define SL811HS_PACKET_BUF(is_a) ((is_a) \
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? SL11H_DATA_START \
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: (SL11H_DATA_START + H_MAXPACKET))
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/*-------------------------------------------------------------------------*/
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#define LOG2_PERIODIC_SIZE 5 /* arbitrary; this matches OHCI */
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#define PERIODIC_SIZE (1 << LOG2_PERIODIC_SIZE)
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struct sl811 {
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spinlock_t lock;
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void __iomem *addr_reg;
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void __iomem *data_reg;
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struct sl811_platform_data *board;
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unsigned long stat_insrmv;
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unsigned long stat_wake;
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unsigned long stat_sof;
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unsigned long stat_a;
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unsigned long stat_b;
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unsigned long stat_lost;
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unsigned long stat_overrun;
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/* sw model */
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struct timer_list timer;
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struct sl811h_ep *next_periodic;
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struct sl811h_ep *next_async;
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struct sl811h_ep *active_a;
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unsigned long jiffies_a;
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struct sl811h_ep *active_b;
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unsigned long jiffies_b;
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u32 port1;
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u8 ctrl1, ctrl2, irq_enable;
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u16 frame;
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/* async schedule: control, bulk */
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struct list_head async;
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/* periodic schedule: interrupt, iso */
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u16 load[PERIODIC_SIZE];
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struct sl811h_ep *periodic[PERIODIC_SIZE];
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unsigned periodic_count;
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};
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static inline struct sl811 *hcd_to_sl811(struct usb_hcd *hcd)
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{
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return (struct sl811 *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *sl811_to_hcd(struct sl811 *sl811)
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{
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return container_of((void *) sl811, struct usb_hcd, hcd_priv);
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}
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struct sl811h_ep {
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struct usb_host_endpoint *hep;
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struct usb_device *udev;
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u8 defctrl;
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u8 maxpacket;
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u8 epnum;
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u8 nextpid;
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u16 error_count;
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u16 nak_count;
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u16 length; /* of current packet */
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/* periodic schedule */
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u16 period;
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u16 branch;
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u16 load;
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struct sl811h_ep *next;
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/* async schedule */
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struct list_head schedule;
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};
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/*-------------------------------------------------------------------------*/
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/* These register utilities should work for the SL811S register API too
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* NOTE: caller must hold sl811->lock.
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*/
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static inline u8 sl811_read(struct sl811 *sl811, int reg)
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{
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writeb(reg, sl811->addr_reg);
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return readb(sl811->data_reg);
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}
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static inline void sl811_write(struct sl811 *sl811, int reg, u8 val)
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{
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writeb(reg, sl811->addr_reg);
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writeb(val, sl811->data_reg);
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}
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static inline void
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sl811_write_buf(struct sl811 *sl811, int addr, const void *buf, size_t count)
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{
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const u8 *data;
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void __iomem *data_reg;
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if (!count)
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return;
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writeb(addr, sl811->addr_reg);
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data = buf;
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data_reg = sl811->data_reg;
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do {
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writeb(*data++, data_reg);
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} while (--count);
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}
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static inline void
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sl811_read_buf(struct sl811 *sl811, int addr, void *buf, size_t count)
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{
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u8 *data;
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void __iomem *data_reg;
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if (!count)
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return;
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writeb(addr, sl811->addr_reg);
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data = buf;
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data_reg = sl811->data_reg;
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do {
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*data++ = readb(data_reg);
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} while (--count);
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}
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/*-------------------------------------------------------------------------*/
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#ifdef PACKET_TRACE
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# define PACKET pr_debug("sl811: "stuff)
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#else
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# define PACKET(stuff...) do{}while(0)
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#endif
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