/* SPDX-License-Identifier: GPL-2.0 */
/*
* ISP116x register declarations and HCD data structures
*
* Copyright (C) 2005 Olav Kongas <[email protected]>
* Portions:
* Copyright (C) 2004 Lothar Wassmann
* Copyright (C) 2004 Psion Teklogix
* Copyright (C) 2004 David Brownell
*/
/* us of 1ms frame */
#define MAX_LOAD_LIMIT 850
/* Full speed: max # of bytes to transfer for a single urb
at a time must be < 1024 && must be multiple of 64.
832 allows transferring 4kiB within 5 frames. */
#define MAX_TRANSFER_SIZE_FULLSPEED 832
/* Low speed: there is no reason to schedule in very big
chunks; often the requested long transfers are for
string descriptors containing short strings. */
#define MAX_TRANSFER_SIZE_LOWSPEED 64
/* Bytetime (us), a rough indication of how much time it
would take to transfer a byte of useful data over USB */
#define BYTE_TIME_FULLSPEED 1
#define BYTE_TIME_LOWSPEED 20
/* Buffer sizes */
#define ISP116x_BUF_SIZE 4096
#define ISP116x_ITL_BUFSIZE 0
#define ISP116x_ATL_BUFSIZE ((ISP116x_BUF_SIZE) - 2*(ISP116x_ITL_BUFSIZE))
#define ISP116x_WRITE_OFFSET 0x80
/*------------ ISP116x registers/bits ------------*/
#define HCREVISION 0x00
#define HCCONTROL 0x01
#define HCCONTROL_HCFS (3 << 6) /* host controller
functional state */
#define HCCONTROL_USB_RESET (0 << 6)
#define HCCONTROL_USB_RESUME (1 << 6)
#define HCCONTROL_USB_OPER (2 << 6)
#define HCCONTROL_USB_SUSPEND (3 << 6)
#define HCCONTROL_RWC (1 << 9) /* remote wakeup connected */
#define HCCONTROL_RWE (1 << 10) /* remote wakeup enable */
#define HCCMDSTAT 0x02
#define HCCMDSTAT_HCR (1 << 0) /* host controller reset */
#define HCCMDSTAT_SOC (3 << 16) /* scheduling overrun count */
#define HCINTSTAT 0x03
#define HCINT_SO (1 << 0) /* scheduling overrun */
#define HCINT_WDH (1 << 1) /* writeback of done_head */
#define HCINT_SF (1 << 2) /* start frame */
#define HCINT_RD (1 << 3) /* resume detect */
#define HCINT_UE (1 << 4) /* unrecoverable error */
#define HCINT_FNO (1 << 5) /* frame number overflow */
#define HCINT_RHSC (1 << 6) /* root hub status change */
#define HCINT_OC (1 << 30) /* ownership change */
#define HCINT_MIE (1 << 31) /* master interrupt enable */
#define HCINTENB 0x04
#define HCINTDIS 0x05
#define HCFMINTVL 0x0d
#define HCFMREM 0x0e
#define HCFMNUM 0x0f
#define HCLSTHRESH 0x11
#define HCRHDESCA 0x12
#define RH_A_NDP (0x3 << 0) /* # downstream ports */
#define RH_A_PSM (1 << 8) /* power switching mode */
#define RH_A_NPS (1 << 9) /* no power switching */
#define RH_A_DT (1 << 10) /* device type (mbz) */
#define RH_A_OCPM (1 << 11) /* overcurrent protection
mode */
#define RH_A_NOCP (1 << 12) /* no overcurrent protection */
#define RH_A_POTPGT (0xff << 24) /* power on -> power good
time */
#define HCRHDESCB 0x13
#define RH_B_DR (0xffff << 0) /* device removable flags */
#define RH_B_PPCM (0xffff << 16) /* port power control mask */
#define HCRHSTATUS 0x14
#define RH_HS_LPS (1 << 0) /* local power status */
#define RH_HS_OCI (1 << 1) /* over current indicator */
#define RH_HS_DRWE (1 << 15) /* device remote wakeup
enable */
#define RH_HS_LPSC (1 << 16) /* local power status change */
#define RH_HS_OCIC (1 << 17) /* over current indicator
change */
#define RH_HS_CRWE (1 << 31) /* clear remote wakeup
enable */
#define HCRHPORT1 0x15
#define RH_PS_CCS (1 << 0) /* current connect status */
#define RH_PS_PES (1 << 1) /* port enable status */
#define RH_PS_PSS (1 << 2) /* port suspend status */
#define RH_PS_POCI (1 << 3) /* port over current
indicator */
#define RH_PS_PRS (1 << 4) /* port reset status */
#define RH_PS_PPS (1 << 8) /* port power status */
#define RH_PS_LSDA (1 << 9) /* low speed device attached */
#define RH_PS_CSC (1 << 16) /* connect status change */
#define RH_PS_PESC (1 << 17) /* port enable status change */
#define RH_PS_PSSC (1 << 18) /* port suspend status
change */
#define RH_PS_OCIC (1 << 19) /* over current indicator
change */
#define RH_PS_PRSC (1 << 20) /* port reset status change */
#define HCRHPORT_CLRMASK (0x1f << 16)
#define HCRHPORT2 0x16
#define HCHWCFG 0x20
#define HCHWCFG_15KRSEL (1 << 12)
#define HCHWCFG_CLKNOTSTOP (1 << 11)
#define HCHWCFG_ANALOG_OC (1 << 10)
#define HCHWCFG_DACK_MODE (1 << 8)
#define HCHWCFG_EOT_POL (1 << 7)
#define HCHWCFG_DACK_POL (1 << 6)
#define HCHWCFG_DREQ_POL (1 << 5)
#define HCHWCFG_DBWIDTH_MASK (0x03 << 3)
#define HCHWCFG_DBWIDTH(n) (((n) << 3) & HCHWCFG_DBWIDTH_MASK)
#define HCHWCFG_INT_POL (1 << 2)
#define HCHWCFG_INT_TRIGGER (1 << 1)
#define HCHWCFG_INT_ENABLE (1 << 0)
#define HCDMACFG 0x21
#define HCDMACFG_BURST_LEN_MASK (0x03 << 5)
#define HCDMACFG_BURST_LEN(n) (((n) << 5) & HCDMACFG_BURST_LEN_MASK)
#define HCDMACFG_BURST_LEN_1 HCDMACFG_BURST_LEN(0)
#define HCDMACFG_BURST_LEN_4 HCDMACFG_BURST_LEN(1)
#define HCDMACFG_BURST_LEN_8 HCDMACFG_BURST_LEN(2)
#define HCDMACFG_DMA_ENABLE (1 << 4)
#define HCDMACFG_BUF_TYPE_MASK (0x07 << 1)
#define HCDMACFG_CTR_SEL (1 << 2)
#define HCDMACFG_ITLATL_SEL (1 << 1)
#define HCDMACFG_DMA_RW_SELECT (1 << 0)
#define HCXFERCTR 0x22
#define HCuPINT 0x24
#define HCuPINT_SOF (1 << 0)
#define HCuPINT_ATL (1 << 1)
#define HCuPINT_AIIEOT (1 << 2)
#define HCuPINT_OPR (1 << 4)
#define HCuPINT_SUSP (1 << 5)
#define HCuPINT_CLKRDY (1 << 6)
#define HCuPINTENB 0x25
#define HCCHIPID 0x27
#define HCCHIPID_MASK 0xff00
#define HCCHIPID_MAGIC 0x6100
#define HCSCRATCH 0x28
#define HCSWRES 0x29
#define HCSWRES_MAGIC 0x00f6
#define HCITLBUFLEN 0x2a
#define HCATLBUFLEN 0x2b
#define HCBUFSTAT 0x2c
#define HCBUFSTAT_ITL0_FULL (1 << 0)
#define HCBUFSTAT_ITL1_FULL (1 << 1)
#define HCBUFSTAT_ATL_FULL (1 << 2)
#define HCBUFSTAT_ITL0_DONE (1 << 3)
#define HCBUFSTAT_ITL1_DONE (1 << 4)
#define HCBUFSTAT_ATL_DONE (1 << 5)
#define HCRDITL0LEN 0x2d
#define HCRDITL1LEN 0x2e
#define HCITLPORT 0x40
#define HCATLPORT 0x41
/* Philips transfer descriptor */
struct ptd {
u16 count;
#define PTD_COUNT_MSK (0x3ff << 0)
#define PTD_TOGGLE_MSK (1 << 10)
#define PTD_ACTIVE_MSK (1 << 11)
#define PTD_CC_MSK (0xf << 12)
u16 mps;
#define PTD_MPS_MSK (0x3ff << 0)
#define PTD_SPD_MSK (1 << 10)
#define PTD_LAST_MSK (1 << 11)
#define PTD_EP_MSK (0xf << 12)
u16 len;
#define PTD_LEN_MSK (0x3ff << 0)
#define PTD_DIR_MSK (3 << 10)
#define PTD_DIR_SETUP (0)
#define PTD_DIR_OUT (1)
#define PTD_DIR_IN (2)
#define PTD_B5_5_MSK (1 << 13)
u16 faddr;
#define PTD_FA_MSK (0x7f << 0)
#define PTD_FMT_MSK (1 << 7)
} __attribute__ ((packed, aligned(2)));
/* PTD accessor macros. */
#define PTD_GET_COUNT(p) (((p)->count & PTD_COUNT_MSK) >> 0)
#define PTD_COUNT(v) (((v) << 0) & PTD_COUNT_MSK)
#define PTD_GET_TOGGLE(p) (((p)->count & PTD_TOGGLE_MSK) >> 10)
#define PTD_TOGGLE(v) (((v) << 10) & PTD_TOGGLE_MSK)
#define PTD_GET_ACTIVE(p) (((p)->count & PTD_ACTIVE_MSK) >> 11)
#define PTD_ACTIVE(v) (((v) << 11) & PTD_ACTIVE_MSK)
#define PTD_GET_CC(p) (((p)->count & PTD_CC_MSK) >> 12)
#define PTD_CC(v) (((v) << 12) & PTD_CC_MSK)
#define PTD_GET_MPS(p) (((p)->mps & PTD_MPS_MSK) >> 0)
#define PTD_MPS(v) (((v) << 0) & PTD_MPS_MSK)
#define PTD_GET_SPD(p) (((p)->mps & PTD_SPD_MSK) >> 10)
#define PTD_SPD(v) (((v) << 10) & PTD_SPD_MSK)
#define PTD_GET_LAST(p) (((p)->mps & PTD_LAST_MSK) >> 11)
#define PTD_LAST(v) (((v) << 11) & PTD_LAST_MSK)
#define PTD_GET_EP(p) (((p)->mps & PTD_EP_MSK) >> 12)
#define PTD_EP(v) (((v) << 12) & PTD_EP_MSK)
#define PTD_GET_LEN(p) (((p)->len & PTD_LEN_MSK) >> 0)
#define PTD_LEN(v) (((v) << 0) & PTD_LEN_MSK)
#define PTD_GET_DIR(p) (((p)->len & PTD_DIR_MSK) >> 10)
#define PTD_DIR(v) (((v) << 10) & PTD_DIR_MSK)
#define PTD_GET_B5_5(p) (((p)->len & PTD_B5_5_MSK) >> 13)
#define PTD_B5_5(v) (((v) << 13) & PTD_B5_5_MSK)
#define PTD_GET_FA(p) (((p)->faddr & PTD_FA_MSK) >> 0)
#define PTD_FA(v) (((v) << 0) & PTD_FA_MSK)
#define PTD_GET_FMT(p) (((p)->faddr & PTD_FMT_MSK) >> 7)
#define PTD_FMT(v) (((v) << 7) & PTD_FMT_MSK)
/* Hardware transfer status codes -- CC from ptd->count */
#define TD_CC_NOERROR 0x00
#define TD_CC_CRC 0x01
#define TD_CC_BITSTUFFING 0x02
#define TD_CC_DATATOGGLEM 0x03
#define TD_CC_STALL 0x04
#define TD_DEVNOTRESP 0x05
#define TD_PIDCHECKFAIL 0x06
#define TD_UNEXPECTEDPID 0x07
#define TD_DATAOVERRUN 0x08
#define TD_DATAUNDERRUN 0x09
/* 0x0A, 0x0B reserved for hardware */
#define TD_BUFFEROVERRUN 0x0C
#define TD_BUFFERUNDERRUN 0x0D
/* 0x0E, 0x0F reserved for HCD */
#define TD_NOTACCESSED 0x0F
/* map PTD status codes (CC) to errno values */
static const int cc_to_error[16] = {
/* No Error */ 0,
/* CRC Error */ -EILSEQ,
/* Bit Stuff */ -EPROTO,
/* Data Togg */ -EILSEQ,
/* Stall */ -EPIPE,
/* DevNotResp */ -ETIME,
/* PIDCheck */ -EPROTO,
/* UnExpPID */ -EPROTO,
/* DataOver */ -EOVERFLOW,
/* DataUnder */ -EREMOTEIO,
/* (for hw) */ -EIO,
/* (for hw) */ -EIO,
/* BufferOver */ -ECOMM,
/* BuffUnder */ -ENOSR,
/* (for HCD) */ -EALREADY,
/* (for HCD) */ -EALREADY
};
/*--------------------------------------------------------------*/
#define LOG2_PERIODIC_SIZE 5 /* arbitrary; this matches OHCI */
#define PERIODIC_SIZE (1 << LOG2_PERIODIC_SIZE)
struct isp116x {
spinlock_t lock;
void __iomem *addr_reg;
void __iomem *data_reg;
struct isp116x_platform_data *board;
unsigned long stat1, stat2, stat4, stat8, stat16;
/* HC registers */
u32 intenb; /* "OHCI" interrupts */
u16 irqenb; /* uP interrupts */
/* Root hub registers */
u32 rhdesca;
u32 rhdescb;
u32 rhstatus;
/* async schedule: control, bulk */
struct list_head async;
/* periodic schedule: int */
u16 load[PERIODIC_SIZE];
struct isp116x_ep *periodic[PERIODIC_SIZE];
unsigned periodic_count;
u16 fmindex;
/* Schedule for the current frame */
struct isp116x_ep *atl_active;
int atl_buflen;
int atl_bufshrt;
int atl_last_dir;
atomic_t atl_finishing;
};
static inline struct isp116x *hcd_to_isp116x(struct usb_hcd *hcd)
{
return (struct isp116x *)(hcd->hcd_priv);
}
static inline struct usb_hcd *isp116x_to_hcd(struct isp116x *isp116x)
{
return container_of((void *)isp116x, struct usb_hcd, hcd_priv);
}
struct isp116x_ep {
struct usb_host_endpoint *hep;
struct usb_device *udev;
struct ptd ptd;
u8 maxpacket;
u8 epnum;
u8 nextpid;
u16 error_count;
u16 length; /* of current packet */
unsigned char *data; /* to databuf */
/* queue of active EP's (the ones scheduled for the
current frame) */
struct isp116x_ep *active;
/* periodic schedule */
u16 period;
u16 branch;
u16 load;
struct isp116x_ep *next;
/* async schedule */
struct list_head schedule;
};
/*-------------------------------------------------------------------------*/
#define DBG(stuff...) pr_debug("116x: " stuff)
#ifdef VERBOSE
# define VDBG DBG
#else
# define VDBG(stuff...) do{}while(0)
#endif
#define ERR(stuff...) printk(KERN_ERR "116x: " stuff)
#define WARNING(stuff...) printk(KERN_WARNING "116x: " stuff)
#define INFO(stuff...) printk(KERN_INFO "116x: " stuff)
/* ------------------------------------------------- */
#if defined(USE_PLATFORM_DELAY)
#if defined(USE_NDELAY)
#error USE_PLATFORM_DELAY and USE_NDELAY simultaneously defined.
#endif
#define isp116x_delay(h,d) (h)->board->delay( \
isp116x_to_hcd(h)->self.controller,d)
#define isp116x_check_platform_delay(h) ((h)->board->delay == NULL)
#elif defined(USE_NDELAY)
#define isp116x_delay(h,d) ndelay(d)
#define isp116x_check_platform_delay(h) 0
#else
#define isp116x_delay(h,d) do{}while(0)
#define isp116x_check_platform_delay(h) 0
#endif
static inline void isp116x_write_addr(struct isp116x *isp116x, unsigned reg)
{
writew(reg & 0xff, isp116x->addr_reg);
isp116x_delay(isp116x, 300);
}
static inline void isp116x_write_data16(struct isp116x *isp116x, u16 val)
{
writew(val, isp116x->data_reg);
isp116x_delay(isp116x, 150);
}
static inline void isp116x_raw_write_data16(struct isp116x *isp116x, u16 val)
{
__raw_writew(val, isp116x->data_reg);
isp116x_delay(isp116x, 150);
}
static inline u16 isp116x_read_data16(struct isp116x *isp116x)
{
u16 val;
val = readw(isp116x->data_reg);
isp116x_delay(isp116x, 150);
return val;
}
static inline u16 isp116x_raw_read_data16(struct isp116x *isp116x)
{
u16 val;
val = __raw_readw(isp116x->data_reg);
isp116x_delay(isp116x, 150);
return val;
}
static inline void isp116x_write_data32(struct isp116x *isp116x, u32 val)
{
writew(val & 0xffff, isp116x->data_reg);
isp116x_delay(isp116x, 150);
writew(val >> 16, isp116x->data_reg);
isp116x_delay(isp116x, 150);
}
static inline u32 isp116x_read_data32(struct isp116x *isp116x)
{
u32 val;
val = (u32) readw(isp116x->data_reg);
isp116x_delay(isp116x, 150);
val |= ((u32) readw(isp116x->data_reg)) << 16;
isp116x_delay(isp116x, 150);
return val;
}
/* Let's keep register access functions out of line. Hint:
we wait at least 150 ns at every access.
*/
static u16 isp116x_read_reg16(struct isp116x *isp116x, unsigned reg)
{
isp116x_write_addr(isp116x, reg);
return isp116x_read_data16(isp116x);
}
static u32 isp116x_read_reg32(struct isp116x *isp116x, unsigned reg)
{
isp116x_write_addr(isp116x, reg);
return isp116x_read_data32(isp116x);
}
static void isp116x_write_reg16(struct isp116x *isp116x, unsigned reg,
unsigned val)
{
isp116x_write_addr(isp116x, reg | ISP116x_WRITE_OFFSET);
isp116x_write_data16(isp116x, (u16) (val & 0xffff));
}
static void isp116x_write_reg32(struct isp116x *isp116x, unsigned reg,
unsigned val)
{
isp116x_write_addr(isp116x, reg | ISP116x_WRITE_OFFSET);
isp116x_write_data32(isp116x, (u32) val);
}
#define isp116x_show_reg_log(d,r,s) { \
if ((r) < 0x20) { \
DBG("%-12s[%02x]: %08x\n", #r, \
r, isp116x_read_reg32(d, r)); \
} else { \
DBG("%-12s[%02x]: %04x\n", #r, \
r, isp116x_read_reg16(d, r)); \
} \
}
#define isp116x_show_reg_seq(d,r,s) { \
if ((r) < 0x20) { \
seq_printf(s, "%-12s[%02x]: %08x\n", #r, \
r, isp116x_read_reg32(d, r)); \
} else { \
seq_printf(s, "%-12s[%02x]: %04x\n", #r, \
r, isp116x_read_reg16(d, r)); \
} \
}
#define isp116x_show_regs(d,type,s) { \
isp116x_show_reg_##type(d, HCREVISION, s); \
isp116x_show_reg_##type(d, HCCONTROL, s); \
isp116x_show_reg_##type(d, HCCMDSTAT, s); \
isp116x_show_reg_##type(d, HCINTSTAT, s); \
isp116x_show_reg_##type(d, HCINTENB, s); \
isp116x_show_reg_##type(d, HCFMINTVL, s); \
isp116x_show_reg_##type(d, HCFMREM, s); \
isp116x_show_reg_##type(d, HCFMNUM, s); \
isp116x_show_reg_##type(d, HCLSTHRESH, s); \
isp116x_show_reg_##type(d, HCRHDESCA, s); \
isp116x_show_reg_##type(d, HCRHDESCB, s); \
isp116x_show_reg_##type(d, HCRHSTATUS, s); \
isp116x_show_reg_##type(d, HCRHPORT1, s); \
isp116x_show_reg_##type(d, HCRHPORT2, s); \
isp116x_show_reg_##type(d, HCHWCFG, s); \
isp116x_show_reg_##type(d, HCDMACFG, s); \
isp116x_show_reg_##type(d, HCXFERCTR, s); \
isp116x_show_reg_##type(d, HCuPINT, s); \
isp116x_show_reg_##type(d, HCuPINTENB, s); \
isp116x_show_reg_##type(d, HCCHIPID, s); \
isp116x_show_reg_##type(d, HCSCRATCH, s); \
isp116x_show_reg_##type(d, HCITLBUFLEN, s); \
isp116x_show_reg_##type(d, HCATLBUFLEN, s); \
isp116x_show_reg_##type(d, HCBUFSTAT, s); \
isp116x_show_reg_##type(d, HCRDITL0LEN, s); \
isp116x_show_reg_##type(d, HCRDITL1LEN, s); \
}
/*
Dump registers for debugfs.
*/
static inline void isp116x_show_regs_seq(struct isp116x *isp116x,
struct seq_file *s)
{
isp116x_show_regs(isp116x, seq, s);
}
/*
Dump registers to syslog.
*/
static inline void isp116x_show_regs_log(struct isp116x *isp116x)
{
isp116x_show_regs(isp116x, log, NULL);
}
#if defined(URB_TRACE)
#define PIPETYPE(pipe) ({ char *__s; \
if (usb_pipecontrol(pipe)) __s = "ctrl"; \
else if (usb_pipeint(pipe)) __s = "int"; \
else if (usb_pipebulk(pipe)) __s = "bulk"; \
else __s = "iso"; \
__s;})
#define PIPEDIR(pipe) ({ usb_pipein(pipe) ? "in" : "out"; })
#define URB_NOTSHORT(urb) ({ (urb)->transfer_flags & URB_SHORT_NOT_OK ? \
"short_not_ok" : ""; })
/* print debug info about the URB */
static void urb_dbg(struct urb *urb, char *msg)
{
unsigned int pipe;
if (!urb) {
DBG("%s: zero urb\n", msg);
return;
}
pipe = urb->pipe;
DBG("%s: FA %d ep%d%s %s: len %d/%d %s\n", msg,
usb_pipedevice(pipe), usb_pipeendpoint(pipe),
PIPEDIR(pipe), PIPETYPE(pipe),
urb->transfer_buffer_length, urb->actual_length, URB_NOTSHORT(urb));
}
#else
#define urb_dbg(urb,msg) do{}while(0)
#endif /* ! defined(URB_TRACE) */
#if defined(PTD_TRACE)
#define PTD_DIR_STR(ptd) ({char __c; \
switch(PTD_GET_DIR(ptd)){ \
case 0: __c = 's'; break; \
case 1: __c = 'o'; break; \
default: __c = 'i'; break; \
}; __c;})
/*
Dump PTD info. The code documents the format
perfectly, right :)
*/
static inline void dump_ptd(struct ptd *ptd)
{
printk(KERN_WARNING "td: %x %d%c%d %d,%d,%d %x %x%x%x\n",
PTD_GET_CC(ptd), PTD_GET_FA(ptd),
PTD_DIR_STR(ptd), PTD_GET_EP(ptd),
PTD_GET_COUNT(ptd), PTD_GET_LEN(ptd), PTD_GET_MPS(ptd),
PTD_GET_TOGGLE(ptd), PTD_GET_ACTIVE(ptd),
PTD_GET_SPD(ptd), PTD_GET_LAST(ptd));
}
static inline void dump_ptd_out_data(struct ptd *ptd, u8 * buf)
{
int k;
if (PTD_GET_DIR(ptd) != PTD_DIR_IN && PTD_GET_LEN(ptd)) {
printk(KERN_WARNING "-> ");
for (k = 0; k < PTD_GET_LEN(ptd); ++k)
printk("%02x ", ((u8 *) buf)[k]);
printk("\n");
}
}
static inline void dump_ptd_in_data(struct ptd *ptd, u8 * buf)
{
int k;
if (PTD_GET_DIR(ptd) == PTD_DIR_IN && PTD_GET_COUNT(ptd)) {
printk(KERN_WARNING "<- ");
for (k = 0; k < PTD_GET_COUNT(ptd); ++k)
printk("%02x ", ((u8 *) buf)[k]);
printk("\n");
}
if (PTD_GET_LAST(ptd))
printk(KERN_WARNING "-\n");
}
#else
#define dump_ptd(ptd) do{}while(0)
#define dump_ptd_in_data(ptd,buf) do{}while(0)
#define dump_ptd_out_data(ptd,buf) do{}while(0)
#endif /* ! defined(PTD_TRACE) */
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