/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------* * SL811HS USB HCD for Linux Version 0.1 (10/28/2001) * * requires (includes) hc_simple.[hc] simple generic HCD frontend * * COPYRIGHT(C) 2001 by CYPRESS SEMICONDUCTOR INC. * *-------------------------------------------------------------------------* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../core/hcd.h" #undef HC_URB_TIMEOUT #undef HC_SWITCH_INT #undef HC_ENABLE_ISOC #define SL811_DEBUG_ERR #ifdef SL811_DEBUG_ERR #define DBGERR(fmt, args...) printk(fmt,## args) #else #define DBGERR(fmt, args...) #endif #ifdef SL811_DEBUG #define DBG(fmt, args...) printk(fmt,## args) #else #define DBG(fmt, args...) #endif #ifdef SL811_DEBUG_FUNC #define DBGFUNC(fmt, args...) printk(fmt,## args) #else #define DBGFUNC(fmt, args...) #endif #ifdef SL811_DEBUG_DATA #define DBGDATAR(fmt, args...) printk(fmt,## args) #define DBGDATAW(fmt, args...) printk(fmt,## args) #else #define DBGDATAR(fmt, args...) #define DBGDATAW(fmt, args...) #endif #ifdef SL811_DEBUG_VERBOSE #define DBGVERBOSE(fmt, args...) printk(fmt,## args) #else #define DBGVERBOSE(fmt, args...) #endif #define TRUE 1 #define FALSE 0 #define HC_SWITCH_INT #include "hc_sl811.h" #include "hc_simple.h" static int urb_debug = 0; #include "hc_simple.c" #include "hc_sl811_rh.c" /* The base_addr, data_reg_addr, and irq number are board specific. * The current values are design to run on the Accelent SA1110 IDP * NOTE: values need to modify for different development boards */ static int base_addr = 0xd3800000; static int data_reg_addr = 0xd3810000; static int irq = 34; /* forware declaration */ int SL11StartXaction (hci_t * hci, __u8 addr, __u8 epaddr, int pid, int len, int toggle, int slow, int urb_state); static int sofWaitCnt = 0; MODULE_PARM (urb_debug, "i"); MODULE_PARM_DESC (urb_debug, "debug urb messages, default is 0 (no)"); MODULE_PARM (base_addr, "i"); MODULE_PARM_DESC (base_addr, "sl811 base address 0xd3800000"); MODULE_PARM (data_reg_addr, "i"); MODULE_PARM_DESC (data_reg_addr, "sl811 data register address 0xd3810000"); MODULE_PARM (irq, "i"); MODULE_PARM_DESC (irq, "IRQ 34 (default)"); static int hc_reset (hci_t * hci); /*************************************************************************** * Function Name : SL811Read * * Read a byte of data from the SL811H/SL11H * * Input: hci = data structure for the host controller * offset = address of SL811/SL11H register or memory * * Return: data **************************************************************************/ char SL811Read (hci_t * hci, char offset) { hcipriv_t *hp = &hci->hp; char data; writeb (offset, hp->hcport); wmb (); data = readb (hp->hcport2); rmb (); return (data); } /*************************************************************************** * Function Name : SL811Write * * Write a byte of data to the SL811H/SL11H * * Input: hci = data structure for the host controller * offset = address of SL811/SL11H register or memory * data = the data going to write to SL811H * * Return: none **************************************************************************/ void SL811Write (hci_t * hci, char offset, char data) { hcipriv_t *hp = &hci->hp; writeb (offset, hp->hcport); writeb (data, hp->hcport2); wmb (); } /*************************************************************************** * Function Name : SL811BufRead * * Read consecutive bytes of data from the SL811H/SL11H buffer * * Input: hci = data structure for the host controller * offset = SL811/SL11H register offset * buf = the buffer where the data will store * size = number of bytes to read * * Return: none **************************************************************************/ void SL811BufRead (hci_t * hci, short offset, char *buf, short size) { hcipriv_t *hp = &hci->hp; if (size <= 0) return; writeb ((char) offset, hp->hcport); wmb (); DBGDATAR ("SL811BufRead: offset = 0x%x, data = ", offset); while (size--) { *buf++ = (char) readb (hp->hcport2); DBGDATAR ("0x%x ", *(buf - 1)); rmb (); } DBGDATAR ("\n"); } /*************************************************************************** * Function Name : SL811BufWrite * * Write consecutive bytes of data to the SL811H/SL11H buffer * * Input: hci = data structure for the host controller * offset = SL811/SL11H register offset * buf = the data buffer * size = number of bytes to write * * Return: none **************************************************************************/ void SL811BufWrite (hci_t * hci, short offset, char *buf, short size) { hcipriv_t *hp = &hci->hp; if (size <= 0) return; writeb ((char) offset, hp->hcport); wmb (); DBGDATAW ("SL811BufWrite: offset = 0x%x, data = ", offset); while (size--) { DBGDATAW ("0x%x ", *buf); writeb (*buf, hp->hcport2); wmb (); buf++; } DBGDATAW ("\n"); } /*************************************************************************** * Function Name : regTest * * This routine test the Read/Write functionality of SL811HS registers * * 1) Store original register value into a buffer * 2) Write to registers with a RAMP pattern. (10, 11, 12, ..., 255) * 3) Read from register * 4) Compare the written value with the read value and make sure they are * equivalent * 5) Restore the original register value * * Input: hci = data structure for the host controller * * * Return: TRUE = passed; FALSE = failed **************************************************************************/ int regTest (hci_t * hci) { int i, data, result = TRUE; char buf[256]; DBGFUNC ("Enter regTest\n"); for (i = 0x10; i < 256; i++) { /* save the original buffer */ buf[i] = (char) SL811Read (hci, i); /* Write the new data to the buffer */ SL811Write (hci, i, i); } /* compare the written data */ for (i = 0x10; i < 256; i++) { data = SL811Read (hci, i); if (data != i) { DBGERR ("Pattern test failed!! value = 0x%x, s/b 0x%x\n", data, i); result = FALSE; } } /* restore the data */ for (i = 0x10; i < 256; i++) { SL811Write (hci, i, buf[i]); } return (result); } /*************************************************************************** * Function Name : regShow * * Display all SL811HS register values * * Input: hci = data structure for the host controller * * Return: none **************************************************************************/ void regShow (hci_t * hci) { int i; for (i = 0; i < 256; i++) { printk ("offset %d: 0x%x\n", i, SL811Read (hci, i)); } } /************************************************************************ * Function Name : USBReset * * This function resets SL811HS controller and detects the speed of * the connecting device * * Input: hci = data structure for the host controller * * Return: 0 = no device attached; 1 = USB device attached * ***********************************************************************/ static int USBReset (hci_t * hci) { int status; hcipriv_t *hp = &hci->hp; DBGFUNC ("enter USBReset\n"); SL811Write (hci, SL11H_CTLREG2, 0xae); // setup master and full speed SL811Write (hci, SL11H_CTLREG1, 0x08); // reset USB mdelay (20); // 20ms SL811Write (hci, SL11H_CTLREG1, 0); // remove SE0 for (status = 0; status < 100; status++) SL811Write (hci, SL11H_INTSTATREG, 0xff); // clear all interrupt bits status = SL811Read (hci, SL11H_INTSTATREG); if (status & 0x40) // Check if device is removed { DBG ("USBReset: Device removed\n"); SL811Write (hci, SL11H_INTENBLREG, SL11H_INTMASK_XFERDONE | SL11H_INTMASK_SOFINTR | SL11H_INTMASK_INSRMV); hp->RHportStatus->portStatus &= ~(PORT_CONNECT_STAT | PORT_ENABLE_STAT); return 0; } SL811Write (hci, SL11H_BUFLNTHREG_B, 0); //zero lenth SL811Write (hci, SL11H_PIDEPREG_B, 0x50); //send SOF to EP0 SL811Write (hci, SL11H_DEVADDRREG_B, 0x01); //address0 SL811Write (hci, SL11H_SOFLOWREG, 0xe0); if (!(status & 0x80)) { /* slow speed device connect directly to root-hub */ DBG ("USBReset: low speed Device attached\n"); SL811Write (hci, SL11H_CTLREG1, 0x8); mdelay (20); SL811Write (hci, SL11H_SOFTMRREG, 0xee); SL811Write (hci, SL11H_CTLREG1, 0x21); /* start the SOF or EOP */ SL811Write (hci, SL11H_HOSTCTLREG_B, 0x01); hp->RHportStatus->portStatus |= (PORT_CONNECT_STAT | PORT_LOW_SPEED_DEV_ATTACH_STAT); /* clear all interrupt bits */ for (status = 0; status < 20; status++) SL811Write (hci, SL11H_INTSTATREG, 0xff); } else { /* full speed device connect directly to root hub */ DBG ("USBReset: full speed Device attached\n"); SL811Write (hci, SL11H_CTLREG1, 0x8); mdelay (20); SL811Write (hci, SL11H_SOFTMRREG, 0xae); SL811Write (hci, SL11H_CTLREG1, 0x01); /* start the SOF or EOP */ SL811Write (hci, SL11H_HOSTCTLREG_B, 0x01); hp->RHportStatus->portStatus |= (PORT_CONNECT_STAT); hp->RHportStatus->portStatus &= ~PORT_LOW_SPEED_DEV_ATTACH_STAT; /* clear all interrupt bits */ SL811Write (hci, SL11H_INTSTATREG, 0xff); } /* enable all interrupts */ SL811Write (hci, SL11H_INTENBLREG, SL11H_INTMASK_XFERDONE | SL11H_INTMASK_SOFINTR | SL11H_INTMASK_INSRMV); return 1; } /*-------------------------------------------------------------------------*/ /* tl functions */ static inline void hc_mark_last_trans (hci_t * hci) { hcipriv_t *hp = &hci->hp; __u8 *ptd = hp->tl; dbg ("enter hc_mark_last_trans\n"); if (ptd == NULL) { printk ("hc_mark_last_trans: ptd = null\n"); return; } if (hp->xferPktLen > 0) *(ptd + hp->tl_last) |= (1 << 3); } static inline void hc_flush_data_cache (hci_t * hci, void *data, int len) { } /************************************************************************ * Function Name : hc_add_trans * * This function sets up the SL811HS register and transmit the USB packets. * * 1) Determine if enough time within the current frame to send the packet * 2) Load the data into the SL811HS register * 3) Set the appropriate command to the register and trigger the transmit * * Input: hci = data structure for the host controller * len = data length * data = transmitting data * toggle = USB toggle bit, either 0 or 1 * maxps = maximum packet size for this endpoint * slow = speed of the device * endpoint = endpoint number * address = USB address of the device * pid = packet ID * format = * urb_state = the current stage of USB transaction * * Return: 0 = no time left to schedule the transfer * 1 = success * ***********************************************************************/ static inline int hc_add_trans (hci_t * hci, int len, void *data, int toggle, int maxps, int slow, int endpoint, int address, int pid, int format, int urb_state) { hcipriv_t *hp = &hci->hp; __u16 speed; int ii, jj, kk; DBGFUNC ("enter hc_addr_trans: len =0x%x, toggle:0x%x, endpoing:0x%x," " addr:0x%x, pid:0x%x,format:0x%x\n", len, toggle, endpoint, i address, pid, format); if (len > maxps) { len = maxps; } speed = hp->RHportStatus->portStatus; if (speed & PORT_LOW_SPEED_DEV_ATTACH_STAT) { // ii = (8*7*8 + 6*3) * len + 800; ii = 8 * 8 * len + 1024; } else { if (slow) { // ii = (8*7*8 + 6*3) * len + 800; ii = 8 * 8 * len + 2048; } else // ii = (8*7 + 6*3)*len + 110; ii = 8 * len + 256; } ii += 2 * 10 * len; jj = SL811Read (hci, SL11H_SOFTMRREG); kk = (jj & 0xFF) * 64 - ii; if (kk < 0) { DBGVERBOSE ("hc_add_trans: no bandwidth for schedule, ii = 0x%x," "jj = 0x%x, len =0x%x, active_trans = 0x%x\n", ii, jj, len, hci->active_trans); return (-1); } if (pid != PID_IN) { /* Load data into hc */ SL811BufWrite (hci, SL11H_DATA_START, (__u8 *) data, len); } /* transmit */ SL11StartXaction (hci, (__u8) address, (__u8) endpoint, (__u8) pid, len, toggle, slow, urb_state); return len; } /************************************************************************ * Function Name : hc_parse_trans * * This function checks the status of the transmitted or received packet * and copy the data from the SL811HS register into a buffer. * * 1) Check the status of the packet * 2) If successful, and IN packet then copy the data from the SL811HS register * into a buffer * * Input: hci = data structure for the host controller * actbytes = pointer to actual number of bytes * data = data buffer * cc = packet status * length = the urb transmit length * pid = packet ID * urb_state = the current stage of USB transaction * * Return: 0 ***********************************************************************/ static inline int hc_parse_trans (hci_t * hci, int *actbytes, __u8 * data, int *cc, int *toggle, int length, int pid, int urb_state) { __u8 addr; __u8 len; DBGFUNC ("enter hc_parse_trans\n"); /* get packet status; convert ack rcvd to ack-not-rcvd */ *cc = (int) SL811Read (hci, SL11H_PKTSTATREG); if (*cc & (SL11H_STATMASK_ERROR | SL11H_STATMASK_TMOUT | SL11H_STATMASK_OVF | SL11H_STATMASK_NAK | SL11H_STATMASK_STALL)) { if (*cc & SL11H_STATMASK_OVF) DBGERR ("parse trans: error recv ack, cc = 0x%x, TX_BASE_Len = " "0x%x, TX_count=0x%x\n", *cc, SL811Read (hci, SL11H_BUFLNTHREG), SL811Read (hci, SL11H_XFERCNTREG)); } else { DBGVERBOSE ("parse trans: recv ack, cc = 0x%x, len = 0x%x, \n", *cc, length); /* Successful data */ if ((pid == PID_IN) && (urb_state != US_CTRL_SETUP)) { /* Find the base address */ addr = SL811Read (hci, SL11H_BUFADDRREG); /* Find the Transmit Length */ len = SL811Read (hci, SL11H_BUFLNTHREG); /* The actual data length = xmit length reg - xfer count reg */ *actbytes = len - SL811Read (hci, SL11H_XFERCNTREG); if ((data != NULL) && (*actbytes > 0)) { SL811BufRead (hci, addr, data, *actbytes); } else if ((data == NULL) && (*actbytes <= 0)) { DBGERR ("hc_parse_trans: data = NULL or actbyte = 0x%x\n", *actbytes); return 0; } } else if (pid == PID_OUT) { *actbytes = length; } else { // printk ("ERR:parse_trans, pid != IN or OUT, pid = 0x%x\n", pid); } *toggle = !*toggle; } return 0; } /************************************************************************ * Function Name : hc_start_int * * This function enables SL811HS interrupts * * Input: hci = data structure for the host controller * * Return: none ***********************************************************************/ static void hc_start_int (hci_t * hci) { #ifdef HC_SWITCH_INT int mask = SL11H_INTMASK_XFERDONE | SL11H_INTMASK_SOFINTR | SL11H_INTMASK_INSRMV | SL11H_INTMASK_USBRESET; SL811Write (hci, IntEna, mask); #endif } /************************************************************************ * Function Name : hc_stop_int * * This function disables SL811HS interrupts * * Input: hci = data structure for the host controller * * Return: none ***********************************************************************/ static void hc_stop_int (hci_t * hci) { #ifdef HC_SWITCH_INT SL811Write (hci, SL11H_INTSTATREG, 0xff); // SL811Write(hci, SL11H_INTENBLREG, SL11H_INTMASK_INSRMV); #endif } /************************************************************************ * Function Name : handleInsRmvIntr * * This function handles the insertion or removal of device on SL811HS. * It resets the controller and updates the port status * * Input: hci = data structure for the host controller * * Return: none ***********************************************************************/ void handleInsRmvIntr (hci_t * hci) { hcipriv_t *hp = &hci->hp; USBReset (hci); /* Changes in connection status */ hp->RHportStatus->portChange |= PORT_CONNECT_CHANGE; /* Port Enable or Disable */ if (hp->RHportStatus->portStatus & PORT_CONNECT_STAT) { /* device is connected to the port: * 1) Enable port * 2) Resume ?? */ // hp->RHportStatus->portChange |= PORT_ENABLE_CHANGE; /* Over Current is not supported by the SL811 HW ?? */ /* How about the Port Power ?? */ } else { /* Device has disconnect: * 1) Disable port */ hp->RHportStatus->portStatus &= ~(PORT_ENABLE_STAT); hp->RHportStatus->portChange |= PORT_ENABLE_CHANGE; } } /***************************************************************** * * Function Name: SL11StartXaction * * This functions load the registers with appropriate value and * transmit the packet. * * Input: hci = data structure for the host controller * addr = USB address of the device * epaddr = endpoint number * pid = packet ID * len = data length * toggle = USB toggle bit, either 0 or 1 * slow = speed of the device * urb_state = the current stage of USB transaction * * Return: 0 = error; 1 = successful * *****************************************************************/ int SL11StartXaction (hci_t * hci, __u8 addr, __u8 epaddr, int pid, int len, int toggle, int slow, int urb_state) { hcipriv_t *hp = &hci->hp; __u8 cmd = 0; __u8 setup_data[4]; __u16 speed; speed = hp->RHportStatus->portStatus; if (!(speed & PORT_LOW_SPEED_DEV_ATTACH_STAT) && slow) { cmd |= SL11H_HCTLMASK_PREAMBLE; } switch (pid) { case PID_SETUP: cmd &= SL11H_HCTLMASK_PREAMBLE; cmd |= (SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENBLEP | SL11H_HCTLMASK_WRITE); break; case PID_OUT: cmd &= (SL11H_HCTLMASK_SEQ | SL11H_HCTLMASK_PREAMBLE); cmd |= (SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENBLEP | SL11H_HCTLMASK_WRITE); if (toggle) { cmd |= SL11H_HCTLMASK_SEQ; } break; case PID_IN: cmd &= (SL11H_HCTLMASK_SEQ | SL11H_HCTLMASK_PREAMBLE); cmd |= (SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENBLEP); break; default: DBGERR ("ERR: SL11StartXaction: unknow pid = 0x%x\n", pid); return 0; } setup_data[0] = SL11H_DATA_START; setup_data[1] = len; setup_data[2] = (((pid & 0x0F) << 4) | (epaddr & 0xF)); setup_data[3] = addr & 0x7F; SL811BufWrite (hci, SL11H_BUFADDRREG, (__u8 *) & setup_data[0], 4); SL811Write (hci, SL11H_HOSTCTLREG, cmd); #if 0 /* The SL811 has a hardware flaw when hub devices sends out * SE0 between packets. It has been found in a TI chipset and * cypress hub chipset. It causes the SL811 to hang * The workaround is to re-issue the preample again. */ if ((cmd & SL11H_HCTLMASK_PREAMBLE)) { SL811Write (hci, SL11H_PIDEPREG_B, 0xc0); SL811Write (hci, SL11H_HOSTCTLREG_B, 0x1); // send the premable } #endif return 1; } /***************************************************************** * * Function Name: hc_interrupt * * Interrupt service routine. * * 1) determine the causes of interrupt * 2) clears all interrupts * 3) calls appropriate function to service the interrupt * * Input: irq = interrupt line associated with the controller * hci = data structure for the host controller * r = holds the snapshot of the processor's context before * the processor entered interrupt code. (not used here) * * Return value : None. * *****************************************************************/ static void hc_interrupt (int irq, void *__hci, struct pt_regs *r) { char ii; hci_t *hci = __hci; int isExcessNak = 0; int urb_state = 0; char tmpIrq = 0; /* Get value from interrupt status register */ ii = SL811Read (hci, SL11H_INTSTATREG); if (ii & SL11H_INTMASK_INSRMV) { /* Device insertion or removal detected for the USB port */ SL811Write (hci, SL11H_INTENBLREG, 0); SL811Write (hci, SL11H_CTLREG1, 0); mdelay (100); // wait for device stable handleInsRmvIntr (hci); return; } /* Clear all interrupts */ SL811Write (hci, SL11H_INTSTATREG, 0xff); if (ii & SL11H_INTMASK_XFERDONE) { /* USB Done interrupt occurred */ urb_state = sh_done_list (hci, &isExcessNak); #ifdef WARNING if (hci->td_array->len > 0) printk ("WARNING: IRQ, td_array->len = 0x%x, s/b:0\n", hci->td_array->len); #endif if (hci->td_array->len == 0 && !isExcessNak && !(ii & SL11H_INTMASK_SOFINTR) && (urb_state == 0)) { if (urb_state == 0) { /* All urb_state has not been finished yet! * continue with the current urb transaction */ if (hci->last_packet_nak == 0) { if (!usb_pipecontrol (hci->td_array->td[0].urb->pipe)) sh_add_packet (hci, hci->td_array-> td[0].urb); } } else { /* The last transaction has completed: * schedule the next transaction */ sh_schedule_trans (hci, 0); } } SL811Write (hci, SL11H_INTSTATREG, 0xff); return; } if (ii & SL11H_INTMASK_SOFINTR) { hci->frame_number = (hci->frame_number + 1) % 2048; if (hci->td_array->len == 0) sh_schedule_trans (hci, 1); else { if (sofWaitCnt++ > 100) { /* The last transaction has not completed. * Need to retire the current td, and let * it transmit again later on. * (THIS NEEDS TO BE WORK ON MORE, IT SHOULD NEVER * GET TO THIS POINT) */ DBGERR ("SOF interrupt: td_array->len = 0x%x, s/b: 0\n", hci->td_array->len); urb_print (hci->td_array->td[hci->td_array->len - 1].urb, "INTERRUPT", 0); sh_done_list (hci, &isExcessNak); SL811Write (hci, SL11H_INTSTATREG, 0xff); hci->td_array->len = 0; sofWaitCnt = 0; } } tmpIrq = SL811Read (hci, SL11H_INTSTATREG) & SL811Read (hci, SL11H_INTENBLREG); if (tmpIrq) { DBG ("IRQ occurred while service SOF: irq = 0x%x\n", tmpIrq); /* If we receive a DONE IRQ after schedule, need to * handle DONE IRQ again */ if (tmpIrq & SL11H_INTMASK_XFERDONE) { DBGERR ("IRQ occurred while service SOF: irq = 0x%x\n", tmpIrq); urb_state = sh_done_list (hci, &isExcessNak); } SL811Write (hci, SL11H_INTSTATREG, 0xff); } } else { DBG ("SL811 ISR: unknown, int = 0x%x \n", ii); } SL811Write (hci, SL11H_INTSTATREG, 0xff); return; } /***************************************************************** * * Function Name: hc_reset * * This function does register test and resets the SL811HS * controller. * * Input: hci = data structure for the host controller * * Return value : 0 * *****************************************************************/ static int hc_reset (hci_t * hci) { int attachFlag = 0; DBGFUNC ("Enter hc_reset\n"); regTest (hci); attachFlag = USBReset (hci); if (attachFlag) { setPortChange (hci, PORT_CONNECT_CHANGE); } return (0); } /***************************************************************** * * Function Name: hc_alloc_trans_buffer * * This function allocates all transfer buffer * * Input: hci = data structure for the host controller * * Return value : 0 * *****************************************************************/ static int hc_alloc_trans_buffer (hci_t * hci) { hcipriv_t *hp = &hci->hp; int maxlen; hp->itl0_len = 0; hp->itl1_len = 0; hp->atl_len = 0; hp->itl_buffer_len = 1024; hp->atl_buffer_len = 4096 - 2 * hp->itl_buffer_len; /* 2048 */ maxlen = (hp->itl_buffer_len > hp->atl_buffer_len) ? hp->itl_buffer_len : hp->atl_buffer_len; hp->tl = kmalloc (maxlen, GFP_KERNEL); if (!hp->tl) return -ENOMEM; memset (hp->tl, 0, maxlen); return 0; } /***************************************************************** * * Function Name: getPortStatusAndChange * * This function gets the ports status from SL811 and format it * to a USB request format * * Input: hci = data structure for the host controller * * Return value : port status and change * *****************************************************************/ static __u32 getPortStatusAndChange (hci_t * hci) { hcipriv_t *hp = &hci->hp; __u32 portstatus; DBGFUNC ("enter getPorStatusAndChange\n"); portstatus = hp->RHportStatus->portChange << 16 | hp->RHportStatus->portStatus; return (portstatus); } /***************************************************************** * * Function Name: setPortChange * * This function set the bit position of portChange. * * Input: hci = data structure for the host controller * bitPos = the bit position * * Return value : none * *****************************************************************/ static void setPortChange (hci_t * hci, __u16 bitPos) { hcipriv_t *hp = &hci->hp; switch (bitPos) { case PORT_CONNECT_STAT: hp->RHportStatus->portChange |= bitPos; break; case PORT_ENABLE_STAT: hp->RHportStatus->portChange |= bitPos; break; case PORT_RESET_STAT: hp->RHportStatus->portChange |= bitPos; break; case PORT_POWER_STAT: hp->RHportStatus->portChange |= bitPos; break; case PORT_SUSPEND_STAT: hp->RHportStatus->portChange |= bitPos; break; case PORT_OVER_CURRENT_STAT: hp->RHportStatus->portChange |= bitPos; break; } } /***************************************************************** * * Function Name: clrPortChange * * This function clear the bit position of portChange. * * Input: hci = data structure for the host controller * bitPos = the bit position * * Return value : none * *****************************************************************/ static void clrPortChange (hci_t * hci, __u16 bitPos) { hcipriv_t *hp = &hci->hp; switch (bitPos) { case PORT_CONNECT_CHANGE: hp->RHportStatus->portChange &= ~bitPos; break; case PORT_ENABLE_CHANGE: hp->RHportStatus->portChange &= ~bitPos; break; case PORT_RESET_CHANGE: hp->RHportStatus->portChange &= ~bitPos; break; case PORT_SUSPEND_CHANGE: hp->RHportStatus->portChange &= ~bitPos; break; case PORT_OVER_CURRENT_CHANGE: hp->RHportStatus->portChange &= ~bitPos; break; } } /***************************************************************** * * Function Name: clrPortStatus * * This function clear the bit position of portStatus. * * Input: hci = data structure for the host controller * bitPos = the bit position * * Return value : none * *****************************************************************/ static void clrPortStatus (hci_t * hci, __u16 bitPos) { hcipriv_t *hp = &hci->hp; switch (bitPos) { case PORT_ENABLE_STAT: hp->RHportStatus->portStatus &= ~bitPos; break; case PORT_RESET_STAT: hp->RHportStatus->portStatus &= ~bitPos; break; case PORT_POWER_STAT: hp->RHportStatus->portStatus &= ~bitPos; break; case PORT_SUSPEND_STAT: hp->RHportStatus->portStatus &= ~bitPos; break; } } /***************************************************************** * * Function Name: setPortStatus * * This function set the bit position of portStatus. * * Input: hci = data structure for the host controller * bitPos = the bit position * * Return value : none * *****************************************************************/ static void setPortStatus (hci_t * hci, __u16 bitPos) { hcipriv_t *hp = &hci->hp; switch (bitPos) { case PORT_ENABLE_STAT: hp->RHportStatus->portStatus |= bitPos; break; case PORT_RESET_STAT: hp->RHportStatus->portStatus |= bitPos; break; case PORT_POWER_STAT: hp->RHportStatus->portStatus |= bitPos; break; case PORT_SUSPEND_STAT: hp->RHportStatus->portStatus |= bitPos; break; } } /***************************************************************** * * Function Name: hc_start * * This function starts the root hub functionality. * * Input: hci = data structure for the host controller * * Return value : 0 * *****************************************************************/ static int hc_start (hci_t * hci) { DBGFUNC ("Enter hc_start\n"); rh_connect_rh (hci); return 0; } /***************************************************************** * * Function Name: hc_alloc_hci * * This function allocates all data structure and store in the * private data structure. * * Input: hci = data structure for the host controller * * Return value : 0 * *****************************************************************/ static hci_t *__devinit hc_alloc_hci (void) { hci_t *hci; hcipriv_t *hp; portstat_t *ps; struct usb_bus *bus; DBGFUNC ("Enter hc_alloc_hci\n"); hci = (hci_t *) kmalloc (sizeof (hci_t), GFP_KERNEL); if (!hci) return NULL; memset (hci, 0, sizeof (hci_t)); hp = &hci->hp; hp->irq = -1; hp->hcport = -1; /* setup root hub port status */ ps = (portstat_t *) kmalloc (sizeof (portstat_t), GFP_KERNEL); if (!ps) return NULL; ps->portStatus = PORT_STAT_DEFAULT; ps->portChange = PORT_CHANGE_DEFAULT; hp->RHportStatus = ps; hci->nakCnt = 0; hci->last_packet_nak = 0; hci->a_td_array.len = 0; hci->i_td_array[0].len = 0; hci->i_td_array[1].len = 0; hci->td_array = &hci->a_td_array; hci->active_urbs = 0; hci->active_trans = 0; INIT_LIST_HEAD (&hci->hci_hcd_list); list_add (&hci->hci_hcd_list, &hci_hcd_list); init_waitqueue_head (&hci->waitq); INIT_LIST_HEAD (&hci->ctrl_list); INIT_LIST_HEAD (&hci->bulk_list); INIT_LIST_HEAD (&hci->iso_list); INIT_LIST_HEAD (&hci->intr_list); INIT_LIST_HEAD (&hci->del_list); bus = usb_alloc_bus (&hci_device_operations); if (!bus) { kfree (hci); kfree (ps); return NULL; } hci->bus = bus; bus->hcpriv = (void *) hci; return hci; } /***************************************************************** * * Function Name: hc_release_hci * * This function De-allocate all resources * * Input: hci = data structure for the host controller * * Return value : 0 * *****************************************************************/ static void hc_release_hci (hci_t * hci) { hcipriv_t *hp = &hci->hp; DBGFUNC ("Enter hc_release_hci\n"); /* disconnect all devices */ if (hci->bus->root_hub) usb_disconnect (&hci->bus->root_hub); hc_reset (hci); if (hp->tl) kfree (hp->tl); if (hp->hcport > 0) { release_region (hp->hcport, 2); hp->hcport = 0; } if (hp->irq >= 0) { free_irq (hp->irq, hci); hp->irq = -1; } usb_deregister_bus (hci->bus); usb_put_bus (hci->bus); list_del_init (&hci->hci_hcd_list); kfree (hci); } /***************************************************************** * * Function Name: init_irq * * This function is board specific. It sets up the interrupt to * be an edge trigger and trigger on the rising edge * * Input: none * * Return value : none * *****************************************************************/ void init_irq (void) { GPDR &= ~(1 << 13); set_GPIO_IRQ_edge (1 << 13, GPIO_RISING_EDGE); } /***************************************************************** * * Function Name: hc_found_hci * * This function request IO memory regions, request IRQ, and * allocate all other resources. * * Input: addr = first IO address * addr2 = second IO address * irq = interrupt number * * Return: 0 = success or error condition * *****************************************************************/ static int __devinit hc_found_hci (int addr, int addr2, int irq) { hci_t *hci; hcipriv_t *hp; DBGFUNC ("Enter hc_found_hci\n"); hci = hc_alloc_hci (); if (!hci) { return -ENOMEM; } init_irq (); hp = &hci->hp; if (!request_region (addr, 256, "SL811 USB HOST")) { DBGERR ("request address %d failed", addr); hc_release_hci (hci); return -EBUSY; } hp->hcport = addr; if (!hp->hcport) { DBGERR ("Error mapping SL811 Memory 0x%x", hp->hcport); } if (!request_region (addr2, 256, "SL811 USB HOST")) { DBGERR ("request address %d failed", addr2); hc_release_hci (hci); return -EBUSY; } hp->hcport2 = addr2; if (!hp->hcport2) { DBGERR ("Error mapping SL811 Memory 0x%x", hp->hcport2); } if (hc_alloc_trans_buffer (hci)) { hc_release_hci (hci); return -ENOMEM; } usb_register_bus (hci->bus); if (request_irq (irq, hc_interrupt, 0, "SL811", hci) != 0) { DBGERR ("request interrupt %d failed", irq); hc_release_hci (hci); return -EBUSY; } hp->irq = irq; printk (KERN_INFO __FILE__ ": USB SL811 at %x, addr2 = %x, IRQ %d\n", addr, addr2, irq); hc_reset (hci); if (hc_start (hci) < 0) { DBGERR ("can't start usb-%x", addr); hc_release_hci (hci); return -EBUSY; } return 0; } /***************************************************************** * * Function Name: hci_hcd_init * * This is an init function, and it is the first function being called * * Input: none * * Return: 0 = success or error condition * *****************************************************************/ static int __init hci_hcd_init (void) { int ret; DBGFUNC ("Enter hci_hcd_init\n"); if (usb_disabled()) return -ENODEV; ret = hc_found_hci (base_addr, data_reg_addr, irq); return ret; } /***************************************************************** * * Function Name: hci_hcd_cleanup * * This is a cleanup function, and it is called when module is * unloaded. * * Input: none * * Return: none * *****************************************************************/ static void __exit hci_hcd_cleanup (void) { struct list_head *hci_l; hci_t *hci; DBGFUNC ("Enter hci_hcd_cleanup\n"); for (hci_l = hci_hcd_list.next; hci_l != &hci_hcd_list;) { hci = list_entry (hci_l, hci_t, hci_hcd_list); hci_l = hci_l->next; hc_release_hci (hci); } } module_init (hci_hcd_init); module_exit (hci_hcd_cleanup); MODULE_AUTHOR ("Pei Liu "); MODULE_DESCRIPTION ("USB SL811HS Host Controller Driver");