patch-2.4.20 linux-2.4.20/drivers/usb/hc_sl811.c
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- Lines: 1360
- Date:
Thu Nov 28 15:53:14 2002
- Orig file:
linux-2.4.19/drivers/usb/hc_sl811.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/drivers/usb/hc_sl811.c linux-2.4.20/drivers/usb/hc_sl811.c
@@ -0,0 +1,1359 @@
+/*-------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------*
+ * 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 <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <linux/usb.h>
+#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);
+ return NULL;
+ }
+
+ hci->bus = bus;
+ bus->bus_name = "sl811";
+ 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_free_bus (hci->bus);
+
+ list_del (&hci->hci_hcd_list);
+ INIT_LIST_HEAD (&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");
+ 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 <pbl@cypress.com>");
+MODULE_DESCRIPTION ("USB SL811HS Host Controller Driver");
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)