+++ /dev/null
-/**************************************************
- *
- * drivers/ifx/serial/ifx_ssc.c
- *
- * Driver for IFX_SSC serial ports
- *
- * Copyright (C) 2004 Infineon Technologies AG
- * Author Michael Schoenenborn (IFX COM TI BT)
- *
- */
-#define IFX_SSC_DRV_VERSION "0.2.1"
-/*
- **************************************************
- *
- * This driver was originally based on the INCA-IP driver, but due to
- * fundamental conceptual drawbacks there has been changed a lot.
- *
- * Based on INCA-IP driver Copyright (c) 2003 Gary Jennejohn <gj@denx.de>
- * Based on the VxWorks drivers Copyright (c) 2002, Infineon Technologies.
- *
- * 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
- *
- */
-
-// ### TO DO: general issues:
-// - power management
-// - interrupt handling (direct/indirect)
-// - pin/mux-handling (just overall concept due to project dependency)
-// - multiple instances capability
-// - slave functionality
-
-/*
- * Include section
- */
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/proc_fs.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-//#include <linux/poll.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/bitops.h>
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/version.h>
-
-#include <asm/amazon/amazon.h>
-#include <asm/amazon/irq.h>
-#include <asm/amazon/ifx_ssc_defines.h>
-#include <asm/amazon/ifx_ssc.h>
-
-#ifdef SSC_FRAME_INT_ENABLE
-#undef SSC_FRAME_INT_ENABLE
-#endif
-
-#define not_yet
-
-#define SPI_VINETIC
-
-/*
- * Deal with CONFIG_MODVERSIONS
- */
-#if CONFIG_MODVERSIONS==1
-# include <linux/modversions.h>
-#endif
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Michael Schoenenborn");
-MODULE_DESCRIPTION("IFX SSC driver");
-MODULE_SUPPORTED_DEVICE("ifx_ssc");
-MODULE_PARM(maj, "i");
-MODULE_PARM_DESC(maj, "Major device number");
-
-/* allow the user to set the major device number */
-static int maj = 0;
-
-
-/*
- * This is the per-channel data structure containing pointers, flags
- * and variables for the port. This driver supports a maximum of PORT_CNT.
- * isp is allocated in ifx_ssc_init() based on the chip version.
- */
-static struct ifx_ssc_port *isp;
-
-/* prototypes for fops */
-static ssize_t ifx_ssc_read(struct file *, char *, size_t, loff_t *);
-static ssize_t ifx_ssc_write(struct file *, const char *, size_t, loff_t *);
-//static unsigned int ifx_ssc_poll(struct file *, struct poll_table_struct *);
-int ifx_ssc_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
-int ifx_ssc_open(struct inode *, struct file *);
-int ifx_ssc_close(struct inode *, struct file *);
-
-/* other forward declarations */
-static unsigned int ifx_ssc_get_kernel_clk(struct ifx_ssc_port *info);
-static void ifx_ssc_rx_int(int, void *, struct pt_regs *);
-static void ifx_ssc_tx_int(int, void *, struct pt_regs *);
-static void ifx_ssc_err_int(int, void *, struct pt_regs *);
-#ifdef SSC_FRAME_INT_ENABLE
-static void ifx_ssc_frm_int(int, void *, struct pt_regs *);
-#endif
-static void tx_int(struct ifx_ssc_port *);
-static int ifx_ssc1_read_proc(char *, char **, off_t, int, int *, void *);
-static void ifx_gpio_init(void);
-/************************************************************************
- * Function declaration
- ************************************************************************/
-//interrupt.c
-extern unsigned int amazon_get_fpi_hz(void);
-extern void disable_amazon_irq(unsigned int irq_nr);
-extern void enable_amazon_irq(unsigned int irq_nr);
-extern void mask_and_ack_amazon_irq(unsigned int irq_nr);
-
-
-/*****************************************************************/
-typedef struct {
- int (*request)(unsigned int irq,
- void (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags,
- const char * devname,
- void *dev_id);
- void (*free)(unsigned int irq, void *dev_id);
- void (*enable)(unsigned int irq);
- void (*disable)(unsigned int irq);
- void (*clear)(unsigned int irq);
-} ifx_int_wrapper_t;
-
-static ifx_int_wrapper_t ifx_int_wrapper = {
- request: request_irq, // IM action: enable int
- free: free_irq, // IM action: disable int
- enable: enable_amazon_irq,
- disable: disable_amazon_irq,
- clear: mask_and_ack_amazon_irq,
- //end:
-};
-
-/* Fops-struct */
-static struct file_operations ifx_ssc_fops = {
- owner: THIS_MODULE,
- read: ifx_ssc_read, /* read */
- write: ifx_ssc_write, /* write */
-// poll: ifx_ssc_poll, /* poll */
- ioctl: ifx_ssc_ioctl, /* ioctl */
- open: ifx_ssc_open, /* open */
- release: ifx_ssc_close, /* release */
-};
-
-
-static inline unsigned int ifx_ssc_get_kernel_clk(struct ifx_ssc_port *info)
-{ // ATTENTION: This function assumes that the CLC register is set with the
- // appropriate value for RMC.
- unsigned int rmc;
-
- rmc = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_CLC) &
- IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
- if (rmc == 0){
- printk("ifx_ssc_get_kernel_clk rmc==0 \n");
- return (0);
- }
- return (amazon_get_fpi_hz() / rmc);
-}
-
-#ifndef not_yet
-#ifdef IFX_SSC_INT_USE_BH
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver
- * (also known as the "bottom half"). This can be called any
- * number of times for any channel without harm.
- */
-static inline void
-ifx_ssc_sched_event(struct ifx_ssc_port *info, int event)
-{
- info->event |= 1 << event; /* remember what kind of event and who */
- queue_task(&info->tqueue, &tq_cyclades); /* it belongs to */
- mark_bh(CYCLADES_BH); /* then trigger event */
-} /* ifx_ssc_sched_event */
-
-
-/*
- * This routine is used to handle the "bottom half" processing for the
- * serial driver, known also the "software interrupt" processing.
- * This processing is done at the kernel interrupt level, after the
- * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
- * is where time-consuming activities which can not be done in the
- * interrupt driver proper are done; the interrupt driver schedules
- * them using ifx_ssc_sched_event(), and they get done here.
- *
- * This is done through one level of indirection--the task queue.
- * When a hardware interrupt service routine wants service by the
- * driver's bottom half, it enqueues the appropriate tq_struct (one
- * per port) to the tq_cyclades work queue and sets a request flag
- * via mark_bh for processing that queue. When the time is right,
- * do_ifx_ssc_bh is called (because of the mark_bh) and it requests
- * that the work queue be processed.
- *
- * Although this may seem unwieldy, it gives the system a way to
- * pass an argument (in this case the pointer to the ifx_ssc_port
- * structure) to the bottom half of the driver. Previous kernels
- * had to poll every port to see if that port needed servicing.
- */
-static void
-do_ifx_ssc_bh(void)
-{
- run_task_queue(&tq_cyclades);
-} /* do_ifx_ssc_bh */
-
-static void
-do_softint(void *private_)
-{
- struct ifx_ssc_port *info = (struct ifx_ssc_port *) private_;
-
- if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
- wake_up_interruptible(&info->open_wait);
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|
- ASYNC_CALLOUT_ACTIVE);
- }
- if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
- wake_up_interruptible(&info->open_wait);
- }
- if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) {
- wake_up_interruptible(&info->delta_msr_wait);
- }
- if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
- wake_up_interruptible(&tty->write_wait);
- }
-#ifdef Z_WAKE
- if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
- wake_up_interruptible(&info->shutdown_wait);
- }
-#endif
-} /* do_softint */
-#endif /* IFX_SSC_INT_USE_BH */
-#endif // not_yet
-
-inline static void
-rx_int(struct ifx_ssc_port *info)
-{
- int fifo_fill_lev, bytes_in_buf, i;
- unsigned long tmp_val;
- unsigned long *tmp_ptr;
- unsigned int rx_valid_cnt;
- /* number of words waiting in the RX FIFO */
- fifo_fill_lev = (READ_PERIPHERAL_REGISTER(info->mapbase +
- IFX_SSC_FSTAT) &
- IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >>
- IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET;
- // Note: There are always 32 bits in a fifo-entry except for the last
- // word of a contigous transfer block and except for not in rx-only
- // mode and CON.ENBV set. But for this case it should be a convention
- // in software which helps:
- // In tx or rx/tx mode all transfers from the buffer to the FIFO are
- // 32-bit wide, except for the last three bytes, which could be a
- // combination of 16- and 8-bit access.
- // => The whole block is received as 32-bit words as a contigous stream,
- // even if there was a gap in tx which has the fifo run out of data!
- // Just the last fifo entry *may* be partially filled (0, 1, 2 or 3 bytes)!
-
- /* free space in the RX buffer */
- bytes_in_buf = info->rxbuf_end - info->rxbuf_ptr;
- // transfer with 32 bits per entry
- while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) {
- tmp_ptr = (unsigned long *)info->rxbuf_ptr;
- *tmp_ptr = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_RB);
- info->rxbuf_ptr += 4;
- info->stats.rxBytes += 4;
- fifo_fill_lev --;
- bytes_in_buf -= 4;
- } // while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0))
- // now do the rest as mentioned in STATE.RXBV
- while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) {
- rx_valid_cnt = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE) &
- IFX_SSC_STATE_RX_BYTE_VALID_MASK) >>
- IFX_SSC_STATE_RX_BYTE_VALID_OFFSET;
- if (rx_valid_cnt == 0) break;
- if (rx_valid_cnt > bytes_in_buf) {
- // ### TO DO: warning message: not block aligned data, other data
- // in this entry will be lost
- rx_valid_cnt = bytes_in_buf;
- }
- tmp_val = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_RB);
-
- for (i=0; i<rx_valid_cnt; i++) {
- *info->rxbuf_ptr = (tmp_val >> ( 8 * (rx_valid_cnt - i-1))) & 0xff;
-/*
- *info->rxbuf_ptr = tmp_val & 0xff;
- tmp_val >>= 8;
-*/
- bytes_in_buf--;
-
-
- info->rxbuf_ptr++;
- }
- info->stats.rxBytes += rx_valid_cnt;
- } // while ((bytes_in_buf > 0) && (fifo_fill_lev > 0))
-
- // check if transfer is complete
- if (info->rxbuf_ptr >= info->rxbuf_end) {
- ifx_int_wrapper.disable(info->rxirq);
- /* wakeup any processes waiting in read() */
- wake_up_interruptible(&info->rwait);
- /* and in poll() */
- //wake_up_interruptible(&info->pwait);
- } else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) &&
- (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_RXCNT) == 0)) {
- // if buffer not filled completely and rx request done initiate new transfer
-/*
- if (info->rxbuf_end - info->rxbuf_ptr < 65536)
-*/
- if (info->rxbuf_end - info->rxbuf_ptr < IFX_SSC_RXREQ_BLOCK_SIZE)
- WRITE_PERIPHERAL_REGISTER((info->rxbuf_end - info->rxbuf_ptr) <<
- IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase + IFX_SSC_RXREQ);
- else
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase + IFX_SSC_RXREQ);
- }
-} // rx_int
-
-inline static void
-tx_int(struct ifx_ssc_port *info)
-{
-
- int fifo_space, fill, i;
- fifo_space = ((READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_ID) &
- IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET) -
- ((READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_FSTAT) &
- IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >>
- IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET);
-
- if (fifo_space == 0)
- return;
-
- fill = info->txbuf_end - info->txbuf_ptr;
-
- if (fill > fifo_space * 4)
- fill = fifo_space * 4;
-
- for (i = 0; i < fill / 4; i++) {
- // at first 32 bit access
- WRITE_PERIPHERAL_REGISTER(*(UINT32 *)info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
- info->txbuf_ptr += 4;
- }
-
- fifo_space -= fill / 4;
- info->stats.txBytes += fill & ~0x3;
- fill &= 0x3;
- if ((fifo_space > 0) & (fill > 1)) {
- // trailing 16 bit access
- WRITE_PERIPHERAL_REGISTER_16(*(UINT16 *)info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
- info->txbuf_ptr += 2;
- info->stats.txBytes += 2;
- fifo_space --;
-/* added by bingtao */
- fill -=2;
- }
- if ((fifo_space > 0) & (fill > 0)) {
- // trailing 8 bit access
- WRITE_PERIPHERAL_REGISTER_8(*(UINT8 *)info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
- info->txbuf_ptr ++;
- info->stats.txBytes ++;
-/*
- fifo_space --;
-*/
- }
-
- // check if transmission complete
- if (info->txbuf_ptr >= info->txbuf_end) {
- ifx_int_wrapper.disable(info->txirq);
- kfree(info->txbuf);
- info->txbuf = NULL;
- /* wake up any process waiting in poll() */
- //wake_up_interruptible(&info->pwait);
- }
-
-} // tx_int
-
-static void
-ifx_ssc_rx_int(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct ifx_ssc_port *info = (struct ifx_ssc_port *)dev_id;
- //WRITE_PERIPHERAL_REGISTER(IFX_SSC_R_BIT, info->mapbase + IFX_SSC_IRN_CR);
- rx_int(info);
-}
-
-static void
-ifx_ssc_tx_int(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct ifx_ssc_port *info = (struct ifx_ssc_port *)dev_id;
- //WRITE_PERIPHERAL_REGISTER(IFX_SSC_T_BIT, info->mapbase + IFX_SSC_IRN_CR);
- tx_int(info);
-}
-
-static void
-ifx_ssc_err_int(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct ifx_ssc_port *info = (struct ifx_ssc_port *)dev_id;
- unsigned int state;
- unsigned int write_back = 0;
- unsigned long flags;
-
-
- local_irq_save(flags);
- state = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE);
-
- if ((state & IFX_SSC_STATE_RX_UFL) != 0) {
- info->stats.rxUnErr++;
- write_back |= IFX_SSC_WHBSTATE_CLR_RX_UFL_ERROR;
- }
- if ((state & IFX_SSC_STATE_RX_OFL) != 0) {
- info->stats.rxOvErr++;
- write_back |= IFX_SSC_WHBSTATE_CLR_RX_OFL_ERROR;
- }
- if ((state & IFX_SSC_STATE_TX_OFL) != 0) {
- info->stats.txOvErr++;
- write_back |= IFX_SSC_WHBSTATE_CLR_TX_OFL_ERROR;
- }
- if ((state & IFX_SSC_STATE_TX_UFL) != 0) {
- info->stats.txUnErr++;
- write_back |= IFX_SSC_WHBSTATE_CLR_TX_UFL_ERROR;
- }
-// if ((state & IFX_SSC_STATE_ABORT_ERR) != 0) {
-// info->stats.abortErr++;
-// write_back |= IFX_SSC_WHBSTATE_CLR_ABORT_ERROR;
-// }
- if ((state & IFX_SSC_STATE_MODE_ERR) != 0) {
- info->stats.modeErr++;
- write_back |= IFX_SSC_WHBSTATE_CLR_MODE_ERROR;
- }
-
- if (write_back)
- WRITE_PERIPHERAL_REGISTER(write_back,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- local_irq_restore(flags);
-}
-
-#ifdef SSC_FRAME_INT_ENABLE
-static void
-ifx_ssc_frm_int(int irq, void *dev_id, struct pt_regs *regs)
-{
- // ### TO DO: wake up framing wait-queue in conjunction with batch execution
-}
-#endif
-
-static void
-ifx_ssc_abort(struct ifx_ssc_port *info)
-{
- unsigned long flags;
- bool enabled;
-
- local_irq_save(flags);
-
- // disable all int's
- ifx_int_wrapper.disable(info->rxirq);
- ifx_int_wrapper.disable(info->txirq);
- ifx_int_wrapper.disable(info->errirq);
-/*
- ifx_int_wrapper.disable(info->frmirq);
-*/
- local_irq_restore(flags);
-
- // disable SSC (also aborts a receive request!)
- // ### TO DO: Perhaps it's better to abort after the receiption of a
- // complete word. The disable cuts the transmission immediatly and
- // releases the chip selects. This could result in unpredictable
- // behavior of connected external devices!
- enabled = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE)
- & IFX_SSC_STATE_IS_ENABLED) != 0;
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
-
- // flush fifos
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_XFCON_FIFO_FLUSH,
- info->mapbase + IFX_SSC_TXFCON);
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_XFCON_FIFO_FLUSH,
- info->mapbase + IFX_SSC_RXFCON);
-
- // free txbuf
- if (info->txbuf != NULL) {
- kfree(info->txbuf);
- info->txbuf = NULL;
- }
-
- // wakeup read process
- if (info->rxbuf != NULL)
- wake_up_interruptible(&info->rwait);
-
- // clear pending int's
- ifx_int_wrapper.clear(info->rxirq);
- ifx_int_wrapper.clear(info->txirq);
- ifx_int_wrapper.clear(info->errirq);
-/*
- ifx_int_wrapper.clear(info->frmirq);
-*/
-
- // clear error flags
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ALL_ERROR,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- //printk("IFX SSC%d: Transmission aborted\n", info->port_nr);
- // enable SSC
- if (enabled)
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_SET_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
-} // ifx_ssc_abort
-
-
-/*
- * This routine is called whenever a port is opened. It enforces
- * exclusive opening of a port and enables interrupts, etc.
- */
-int
-ifx_ssc_open(struct inode *inode, struct file * filp)
-{
- struct ifx_ssc_port *info;
- int line;
- int from_kernel = 0;
-
- if ((inode == (struct inode *)0) || (inode == (struct inode *)1)) {
- from_kernel = 1;
- line = (int)inode;
- }
- else {
- line = MINOR(filp->f_dentry->d_inode->i_rdev);
- filp->f_op = &ifx_ssc_fops;
- }
-
- /* don't open more minor devices than we can support */
- if (line < 0 || line >= PORT_CNT)
- return -ENXIO;
-
- info = &isp[line];
-
- /* exclusive open */
- if (info->port_is_open != 0)
- return -EBUSY;
- info->port_is_open++;
-
- ifx_int_wrapper.disable(info->rxirq);
- ifx_int_wrapper.disable(info->txirq);
- ifx_int_wrapper.disable(info->errirq);
-/*
- ifx_int_wrapper.disable(info->frmirq);
-*/
-
- /* Flush and enable TX/RX FIFO */
- WRITE_PERIPHERAL_REGISTER((IFX_SSC_DEF_TXFIFO_FL <<
- IFX_SSC_XFCON_ITL_OFFSET) |
- IFX_SSC_XFCON_FIFO_FLUSH |
- IFX_SSC_XFCON_FIFO_ENABLE,
- info->mapbase + IFX_SSC_TXFCON);
- WRITE_PERIPHERAL_REGISTER((IFX_SSC_DEF_RXFIFO_FL <<
- IFX_SSC_XFCON_ITL_OFFSET) |
- IFX_SSC_XFCON_FIFO_FLUSH |
- IFX_SSC_XFCON_FIFO_ENABLE,
- info->mapbase + IFX_SSC_RXFCON);
-
-
- /* logically flush the software FIFOs */
- info->rxbuf_ptr = 0;
- info->txbuf_ptr = 0;
-
- /* clear all error bits */
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ALL_ERROR,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- // clear pending interrupts
- ifx_int_wrapper.clear(info->rxirq);
- ifx_int_wrapper.clear(info->txirq);
- ifx_int_wrapper.clear(info->errirq);
-/*
- ifx_int_wrapper.clear(info->frmirq);
-*/
-
- // enable SSC
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_SET_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- MOD_INC_USE_COUNT;
-
- return 0;
-} /* ifx_ssc_open */
-EXPORT_SYMBOL(ifx_ssc_open);
-
-/*
- * This routine is called when a particular device is closed.
- */
-int
-ifx_ssc_close(struct inode *inode, struct file *filp)
-{
- struct ifx_ssc_port *info;
- int idx;
-
- if ((inode == (struct inode *)0) || (inode == (struct inode *)1))
- idx = (int)inode;
- else
- idx = MINOR(filp->f_dentry->d_inode->i_rdev);
-
- if (idx < 0 || idx >= PORT_CNT)
- return -ENXIO;
-
- info = &isp[idx];
- if (!info)
- return -ENXIO;
-
- // disable SSC
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- // call abort function to disable int's, flush fifos...
- ifx_ssc_abort(info);
-
- info->port_is_open --;
- MOD_DEC_USE_COUNT;
-
- return 0;
-} /* ifx_ssc_close */
-EXPORT_SYMBOL(ifx_ssc_close);
-
-/* added by bingtao */
-/* helper routine to handle reads from the kernel or user-space */
-/* info->rxbuf : never kfree and contains valid data */
-/* should be points to NULL after copying data !!! */
-static ssize_t
-ifx_ssc_read_helper_poll(struct ifx_ssc_port *info, char *buf, size_t len,
- int from_kernel)
-{
- ssize_t ret_val;
- unsigned long flags;
-
- if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
- return -EFAULT;
- local_irq_save(flags);
- info->rxbuf_ptr = info->rxbuf;
- info->rxbuf_end = info->rxbuf + len;
- local_irq_restore(flags);
-/* Vinetic driver always works in IFX_SSC_MODE_RXTX */
-/* TXRX in poll mode */
- while (info->rxbuf_ptr < info->rxbuf_end){
-/* This is the key point, if you don't check this condition
- kfree (NULL) will happen
- because tx only need write into FIFO, it's much fast than rx
- So when rx still waiting , tx already finish and release buf
-*/
- if (info->txbuf_ptr < info->txbuf_end) {
- tx_int(info);
- }
-
- rx_int(info);
- };
-
- ret_val = info->rxbuf_ptr - info->rxbuf;
- return (ret_val);
-} // ifx_ssc_read_helper_poll
-
-/* helper routine to handle reads from the kernel or user-space */
-/* info->rx_buf : never kfree and contains valid data */
-/* should be points to NULL after copying data !!! */
-static ssize_t
-ifx_ssc_read_helper(struct ifx_ssc_port *info, char *buf, size_t len,
- int from_kernel)
-{
- ssize_t ret_val;
- unsigned long flags;
- DECLARE_WAITQUEUE(wait, current);
-
- if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
- return -EFAULT;
- local_irq_save(flags);
- info->rxbuf_ptr = info->rxbuf;
- info->rxbuf_end = info->rxbuf + len;
- if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX) {
- if ((info->txbuf == NULL) ||
- (info->txbuf != info->txbuf_ptr) ||
- (info->txbuf_end != len + info->txbuf)) {
- local_irq_restore(flags);
- printk("IFX SSC - %s: write must be called before calling "
- "read in combined RX/TX!\n", __FUNCTION__);
- return -EFAULT;
- }
- local_irq_restore(flags);
- /* should enable tx, right?*/
- tx_int(info);
- if (info->txbuf_ptr < info->txbuf_end){
- ifx_int_wrapper.enable(info->txirq);
- }
-
- ifx_int_wrapper.enable(info->rxirq);
- } else { // rx mode
- local_irq_restore(flags);
- if (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_RXCNT) &
- IFX_SSC_RXCNT_TODO_MASK)
- return -EBUSY;
- ifx_int_wrapper.enable(info->rxirq);
- // rx request limited to ' bytes
-/*
- if (len < 65536)
-*/
- if (len < IFX_SSC_RXREQ_BLOCK_SIZE)
- WRITE_PERIPHERAL_REGISTER(len << IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase + IFX_SSC_RXREQ);
- else
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase + IFX_SSC_RXREQ);
- }
-
- __add_wait_queue(&info->rwait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- // wakeup done in rx_int
-
- do {
- local_irq_save(flags);
- if (info->rxbuf_ptr >= info->rxbuf_end)
- break;
- local_irq_restore(flags);
-
-// if (filp->f_flags & O_NONBLOCK)
-// {
-// N = -EAGAIN;
-// goto out;
-// }
- if (signal_pending(current)) {
- ret_val = -ERESTARTSYS;
- goto out;
- }
- schedule();
- } while (1);
-
- ret_val = info->rxbuf_ptr - info->rxbuf; // should be equal to len
- local_irq_restore(flags);
-
- out:
- current->state = TASK_RUNNING;
- __remove_wait_queue(&info->rwait, &wait);
- return (ret_val);
-} // ifx_ssc_read_helper
-
-
-#if 0
-/* helper routine to handle reads from the kernel or user-space */
-/* appropriate in interrupt context */
-static ssize_t
-ifx_ssc_read_helper(struct ifx_ssc_port *info, char *buf, size_t len,
- int from_kernel)
-{
- ssize_t ret_val;
- unsigned long flags;
- DECLARE_WAITQUEUE(wait, current);
-
- if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
- return -EFAULT;
- local_irq_save(flags);
- info->rxbuf_ptr = info->rxbuf;
- info->rxbuf_end = info->rxbuf + len;
- if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX) {
- if ((info->txbuf == NULL) ||
- (info->txbuf != info->txbuf_ptr) ||
- (info->txbuf_end != len + info->txbuf)) {
- local_irq_restore(flags);
- printk("IFX SSC - %s: write must be called before calling "
- "read in combined RX/TX!\n", __FUNCTION__);
- return -EFAULT;
- }
- local_irq_restore(flags);
- /* should enable tx, right?*/
- tx_int(info);
- if (!in_irq()){
- if (info->txbuf_ptr < info->txbuf_end){
- ifx_int_wrapper.enable(info->txirq);
- }
- ifx_int_wrapper.enable(info->rxirq);
- }
- } else { // rx mode
- local_irq_restore(flags);
- if (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_RXCNT) &
- IFX_SSC_RXCNT_TODO_MASK)
- return -EBUSY;
- if (!in_irq()){
- ifx_int_wrapper.enable(info->rxirq);
- }
-
- if (len < IFX_SSC_RXREQ_BLOCK_SIZE)
- WRITE_PERIPHERAL_REGISTER(len << IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase + IFX_SSC_RXREQ);
- else
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase + IFX_SSC_RXREQ);
- }
- if (in_irq()){
- do {
- rx_int(info);
- if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX) {
- tx_int(info);
- }
-
- if (info->rxbuf_ptr >= info->rxbuf_end)
- break;
- } while (1);
- ret_val = info->rxbuf_ptr - info->rxbuf;
- }else{
- __add_wait_queue(&info->rwait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- // wakeup done in rx_int
-
- do {
- local_irq_save(flags);
- if (info->rxbuf_ptr >= info->rxbuf_end)
- break;
- local_irq_restore(flags);
-
- if (signal_pending(current)) {
- ret_val = -ERESTARTSYS;
- goto out;
- }
- schedule();
- } while (1);
-
- ret_val = info->rxbuf_ptr - info->rxbuf; // should be equal to len
- local_irq_restore(flags);
-
- out:
- current->state = TASK_RUNNING;
- __remove_wait_queue(&info->rwait, &wait);
- }
- return (ret_val);
-} // ifx_ssc_read_helper
-#endif
-
-/* helper routine to handle writes to the kernel or user-space */
-/* info->txbuf has two cases:
- * 1) return value < 0 (-EFAULT), not touched at all
- * 2) kfree and points to NULL in interrupt routine (but maybe later )
- */
-static ssize_t
-ifx_ssc_write_helper(struct ifx_ssc_port *info, const char *buf,
- size_t len, int from_kernel)
-{
- // check if in tx or tx/rx mode
- if (info->opts.modeRxTx == IFX_SSC_MODE_RX)
- return -EFAULT;
-
- info->txbuf_ptr = info->txbuf;
- info->txbuf_end = len + info->txbuf;
- /* start the transmission (not in rx/tx, see read helper) */
- if (info->opts.modeRxTx == IFX_SSC_MODE_TX) {
- tx_int(info);
- if (info->txbuf_ptr < info->txbuf_end){
- ifx_int_wrapper.enable(info->txirq);
- }
- }
- //local_irq_restore(flags);
- return len;
-}
-
-/*
- * kernel interfaces for read and write.
- * The caller must set port to: n for SSC<m> with n=m-1 (e.g. n=0 for SSC1)
- */
-ssize_t
-ifx_ssc_kread(int port, char *kbuf, size_t len)
-{
- struct ifx_ssc_port *info;
- ssize_t ret_val;
-
- if (port < 0 || port >= PORT_CNT)
- return -ENXIO;
-
- if (len == 0)
- return 0;
-
- info = &isp[port];
-
- // check if reception in progress
- if (info->rxbuf != NULL){
- printk("SSC device busy\n");
- return -EBUSY;
- }
-
- info->rxbuf = kbuf;
- if (info->rxbuf == NULL){
- printk("SSC device error\n");
- return -EINVAL;
- }
-
-/* changed by bingtao */
- /* change by TaiCheng */
- //if (!in_irq()){
- if (0){
- ret_val = ifx_ssc_read_helper(info, kbuf, len, 1);
- }else{
- ret_val = ifx_ssc_read_helper_poll(info, kbuf, len, 1);
- };
- info->rxbuf = NULL;
-
- // ### TO DO: perhaps warn if ret_val != len
- ifx_int_wrapper.disable(info->rxirq);
-
- return (ret_val);
-} // ifx_ssc_kread
-EXPORT_SYMBOL(ifx_ssc_kread);
-
-ssize_t
-ifx_ssc_kwrite(int port, const char *kbuf, size_t len)
-{
- struct ifx_ssc_port *info;
- ssize_t ret_val;
-
- if (port < 0 || port >= PORT_CNT)
- return -ENXIO;
-
- if (len == 0)
- return 0;
-
- info = &isp[port];
-
- // check if transmission in progress
- if (info->txbuf != NULL)
- return -EBUSY;
- info->txbuf = (char *)kbuf;
-
- ret_val = ifx_ssc_write_helper(info, info->txbuf, len, 1);
- if (ret_val < 0){
- info->txbuf = NULL;
- }
- return ret_val;
-}
-EXPORT_SYMBOL(ifx_ssc_kwrite);
-
-
-/*
- * user interfaces to read and write
- */
-static ssize_t
-ifx_ssc_read(struct file *filp, char *ubuf, size_t len, loff_t *off)
-{
- ssize_t ret_val;
- int idx;
- struct ifx_ssc_port *info;
-
-/*
- if (len == 0)
- return (0);
-*/
- idx = MINOR(filp->f_dentry->d_inode->i_rdev);
- info = &isp[idx];
-
- // check if reception in progress
- if (info->rxbuf != NULL)
- return -EBUSY;
-
- info->rxbuf = kmalloc(len+ 3, GFP_KERNEL);
- if (info->rxbuf == NULL)
- return -ENOMEM;
-
- ret_val = ifx_ssc_read_helper(info, info->rxbuf, len, 0);
- // ### TO DO: perhaps warn if ret_val != len
- if (copy_to_user((void*)ubuf, info->rxbuf, ret_val) != 0)
- ret_val = -EFAULT;
-
- ifx_int_wrapper.disable(info->rxirq);
-
- kfree(info->rxbuf);
- info->rxbuf = NULL;
- return (ret_val);
-} // ifx_ssc_read
-
-/*
- * As many bytes as we have free space for are copied from the user
- * into txbuf and the actual byte count is returned. The transmission is
- * always kicked off by calling the appropriate TX routine.
- */
-static ssize_t
-ifx_ssc_write(struct file *filp, const char *ubuf, size_t len, loff_t *off)
-{
- int idx;
- struct ifx_ssc_port *info;
- int ret_val;
-
- if (len == 0)
- return (0);
-
- idx = MINOR(filp->f_dentry->d_inode->i_rdev);
- info = &isp[idx];
-
- // check if transmission in progress
- if (info->txbuf != NULL)
- return -EBUSY;
-
- info->txbuf = kmalloc(len+ 3, GFP_KERNEL);
- if (info->txbuf == NULL)
- return -ENOMEM;
-
- ret_val = copy_from_user(info->txbuf, ubuf, len);
- if (ret_val == 0)
- ret_val = ifx_ssc_write_helper(info, info->txbuf, len, 0);
- else
- ret_val = -EFAULT;
- if (ret_val < 0) {
- kfree(info->txbuf); // otherwise will be done in ISR
- info->txbuf = NULL;
- }
- return (ret_val);
-} /* ifx_ssc_write */
-
-
-/*
- * ------------------------------------------------------------
- * ifx_ssc_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-/*-----------------------------------------------------------------------------
- FUNC-NAME : ifx_ssc_frm_status_get
- LONG-NAME : framing status get
- PURPOSE : Get the actual status of the framing.
-
- PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
-
- RESULT : pointer to a structure ifx_ssc_frm_status which holds busy and
- count values.
-
- REMARKS : Returns a register value independent of framing is enabled or
- not! Changes structure inside of info, so the return value isn't
- needed at all, but could be used for simple access.
------------------------------------------------------------------------------*/
-static struct ifx_ssc_frm_status *
-ifx_ssc_frm_status_get(struct ifx_ssc_port *info)
-{
- unsigned long tmp;
-
- tmp = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_SFSTAT);
- info->frm_status.DataBusy = (tmp & IFX_SSC_SFSTAT_IN_DATA) > 0;
- info->frm_status.PauseBusy = (tmp & IFX_SSC_SFSTAT_IN_PAUSE) > 0;
- info->frm_status.DataCount = (tmp & IFX_SSC_SFSTAT_DATA_COUNT_MASK)
- >> IFX_SSC_SFSTAT_DATA_COUNT_OFFSET;
- info->frm_status.PauseCount = (tmp & IFX_SSC_SFSTAT_PAUSE_COUNT_MASK)
- >> IFX_SSC_SFSTAT_PAUSE_COUNT_OFFSET;
- tmp = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_SFCON);
- info->frm_status.EnIntAfterData =
- (tmp & IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE) > 0;
- info->frm_status.EnIntAfterPause =
- (tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0;
- return (&info->frm_status);
-} // ifx_ssc_frm_status_get
-
-
-/*-----------------------------------------------------------------------------
- FUNC-NAME : ifx_ssc_frm_control_get
- LONG-NAME : framing control get
- PURPOSE : Get the actual control values of the framing.
-
- PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
-
- RESULT : pointer to a structure ifx_ssc_frm_opts which holds control bits
- and count reload values.
-
- REMARKS : Changes structure inside of info, so the return value isn't
- needed at all, but could be used for simple access.
------------------------------------------------------------------------------*/
-static struct ifx_ssc_frm_opts *
-ifx_ssc_frm_control_get(struct ifx_ssc_port *info)
-{
- unsigned long tmp;
-
- tmp = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_SFCON);
- info->frm_opts.FrameEnable = (tmp & IFX_SSC_SFCON_SF_ENABLE) > 0;
- info->frm_opts.DataLength = (tmp & IFX_SSC_SFCON_DATA_LENGTH_MASK)
- >> IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
- info->frm_opts.PauseLength = (tmp & IFX_SSC_SFCON_PAUSE_LENGTH_MASK)
- >> IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
- info->frm_opts.IdleData = (tmp & IFX_SSC_SFCON_PAUSE_DATA_MASK)
- >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
- info->frm_opts.IdleClock = (tmp & IFX_SSC_SFCON_PAUSE_CLOCK_MASK)
- >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
- info->frm_opts.StopAfterPause =
- (tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
- return (&info->frm_opts);
-} // ifx_ssc_frm_control_get
-
-
-/*-----------------------------------------------------------------------------
- FUNC-NAME : ifx_ssc_frm_control_set
- LONG-NAME : framing control set
- PURPOSE : Set the actual control values of the framing.
-
- PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
-
- RESULT : pointer to a structure ifx_ssc_frm_opts which holds control bits
- and count reload values.
-
- REMARKS :
------------------------------------------------------------------------------*/
-static int
-ifx_ssc_frm_control_set(struct ifx_ssc_port *info)
-{
- unsigned long tmp;
-
- // check parameters
- if ((info->frm_opts.DataLength > IFX_SSC_SFCON_DATA_LENGTH_MAX) ||
- (info->frm_opts.DataLength < 1) ||
- (info->frm_opts.PauseLength > IFX_SSC_SFCON_PAUSE_LENGTH_MAX) ||
- (info->frm_opts.PauseLength < 1) ||
- ((info->frm_opts.IdleData & ~(IFX_SSC_SFCON_PAUSE_DATA_MASK >>
- IFX_SSC_SFCON_PAUSE_DATA_OFFSET)) != 0 ) ||
- ((info->frm_opts.IdleClock & ~(IFX_SSC_SFCON_PAUSE_CLOCK_MASK >>
- IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET)) != 0 ))
- return -EINVAL;
-
- // read interrupt bits (they're not changed here)
- tmp = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_SFCON) &
- (IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE |
- IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE);
-
- // set all values with respect to it's bit position (for data and pause
- // length set N-1)
- tmp = (info->frm_opts.DataLength - 1) << IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
- tmp |= (info->frm_opts.PauseLength - 1) << IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
- tmp |= info->frm_opts.IdleData << IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
- tmp |= info->frm_opts.IdleClock << IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
- tmp |= info->frm_opts.FrameEnable * IFX_SSC_SFCON_SF_ENABLE;
- tmp |= info->frm_opts.StopAfterPause * IFX_SSC_SFCON_STOP_AFTER_PAUSE;
-
- WRITE_PERIPHERAL_REGISTER(tmp, info->mapbase + IFX_SSC_SFCON);
-
- return 0;
-} // ifx_ssc_frm_control_set
-
-
-/*-----------------------------------------------------------------------------
- FUNC-NAME : ifx_ssc_rxtx_mode_set
- LONG-NAME : rxtx mode set
- PURPOSE : Set the transmission mode.
-
- PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
-
- RESULT : Returns error code
-
- REMARKS : Assumes that SSC not used (SSC disabled, device not opened yet
- or just closed)
------------------------------------------------------------------------------*/
-static int
-ifx_ssc_rxtx_mode_set(struct ifx_ssc_port *info, unsigned int val)
-{
- unsigned long tmp;
-
- // check parameters
- if (!(info) || (val & ~(IFX_SSC_MODE_MASK)))
- return -EINVAL;
- /*check BUSY and RXCNT*/
- if ( READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_BUSY
- ||READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)
- return -EBUSY;
- // modify
- tmp = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_CON) &
- ~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val);
- WRITE_PERIPHERAL_REGISTER(tmp, info->mapbase + IFX_SSC_CON);
- info->opts.modeRxTx = val;
-/*
- printk(KERN_DEBUG "IFX SSC%d: Setting mode to %s%s\n",
- info->port_nr,
- ((val & IFX_SSC_CON_RX_OFF) == 0) ? "rx ":"",
- ((val & IFX_SSC_CON_TX_OFF) == 0) ? "tx":"");
-*/
- return 0;
-} // ifx_ssc_rxtx_mode_set
-
-void ifx_gpio_init(void)
-{
- u32 temp;
-/* set gpio pin p0.10(SPI_DIN) p0.11(SPI_DOUT) p0.12(SPI_CLK) p0.13(SPI_CS2) direction */
- temp = *(AMAZON_GPIO_P0_DIR) ;
- temp &= 0xFFFFFBFF;
- temp |= 0x3800;
- *(AMAZON_GPIO_P0_DIR) = temp;
-/* set port 0 alternate select register 0 */
- temp = *(AMAZON_GPIO_P0_ALTSEL0) ;
- temp &= 0xFFFFC3FF;
- temp |= 0x00001c00;
- *(AMAZON_GPIO_P0_ALTSEL0) = temp;
-
-/* set port 0 alternate select register 1 */
- temp = *(AMAZON_GPIO_P0_ALTSEL1) ;
- temp &= 0xFFFFC3FF;
- temp |= 0x00002000;
- *(AMAZON_GPIO_P0_ALTSEL1) = temp;
-
-/* set port 0 open drain mode register */
- temp = *(AMAZON_GPIO_P0_OD);
- temp |= 0x00003800; /* set output pin normal mode */
- *(AMAZON_GPIO_P0_OD)= temp;
-}
-
-/*
- * This routine intializes the SSC appropriately depending
- * on slave/master and full-/half-duplex mode.
- * It assumes that the SSC is disabled and the fifo's and buffers
- * are flushes later on.
- */
-static int
-ifx_ssc_sethwopts(struct ifx_ssc_port *info)
-{
- unsigned long flags, bits;
- struct ifx_ssc_hwopts *opts = &info->opts;
-
- /* sanity checks */
- if ((opts->dataWidth < IFX_SSC_MIN_DATA_WIDTH) ||
- (opts->dataWidth > IFX_SSC_MAX_DATA_WIDTH)) {
- printk("%s: sanity check failed\n", __FUNCTION__);
- return -EINVAL;
- }
- bits = (opts->dataWidth - 1) << IFX_SSC_CON_DATA_WIDTH_OFFSET;
- bits |= IFX_SSC_CON_ENABLE_BYTE_VALID;
-// if (opts->abortErrDetect)
-// bits |= IFX_SSC_CON_ABORT_ERR_CHECK;
- if (opts->rxOvErrDetect)
- bits |= IFX_SSC_CON_RX_OFL_CHECK;
- if (opts->rxUndErrDetect)
- bits |= IFX_SSC_CON_RX_UFL_CHECK;
- if (opts->txOvErrDetect)
- bits |= IFX_SSC_CON_TX_OFL_CHECK;
- if (opts->txUndErrDetect)
- bits |= IFX_SSC_CON_TX_UFL_CHECK;
- if (opts->loopBack)
- bits |= IFX_SSC_CON_LOOPBACK_MODE;
- if (opts->echoMode)
- bits |= IFX_SSC_CON_ECHO_MODE_ON;
- if (opts->headingControl)
- bits |= IFX_SSC_CON_MSB_FIRST;
- if (opts->clockPhase)
- bits |= IFX_SSC_CON_LATCH_THEN_SHIFT;
- if (opts->clockPolarity)
- bits |= IFX_SSC_CON_CLOCK_FALL;
- switch (opts->modeRxTx) {
- case IFX_SSC_MODE_TX:
- bits |= IFX_SSC_CON_RX_OFF;
- break;
- case IFX_SSC_MODE_RX:
- bits |= IFX_SSC_CON_TX_OFF;
- break;
- } // switch (opts->modeRxT)
- local_irq_save(flags);
- WRITE_PERIPHERAL_REGISTER(bits, info->mapbase + IFX_SSC_CON);
- WRITE_PERIPHERAL_REGISTER((info->opts.gpoCs << IFX_SSC_GPOCON_ISCSB0_POS) |
- (info->opts.gpoInv << IFX_SSC_GPOCON_INVOUT0_POS),
- info->mapbase + IFX_SSC_GPOCON);
- //master mode
- if (opts->masterSelect){
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_SET_MASTER_SELECT,info->mapbase + IFX_SSC_WHBSTATE);
- }else{
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_MASTER_SELECT,info->mapbase + IFX_SSC_WHBSTATE);
- }
- // init serial framing
- WRITE_PERIPHERAL_REGISTER(0, info->mapbase + IFX_SSC_SFCON);
- /* set up the port pins */
- //check for general requirements to switch (external) pad/pin characteristics
- ifx_gpio_init();
- local_irq_restore(flags);
-
- return 0;
-} // ifx_ssc_sethwopts
-
-static int
-ifx_ssc_set_baud(struct ifx_ssc_port *info, unsigned int baud)
-{
- unsigned int ifx_ssc_clock;
- unsigned int br;
- unsigned long flags;
- bool enabled;
-
- ifx_ssc_clock = ifx_ssc_get_kernel_clk(info);
- if (ifx_ssc_clock ==0)
- return -EINVAL;
-
- local_irq_save(flags);
- /* have to disable the SSC to set the baudrate */
- enabled = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE)
- & IFX_SSC_STATE_IS_ENABLED) != 0;
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- // compute divider
- br = ((ifx_ssc_clock >> 1)/baud) - 1;
- asm("SYNC");
- if (br > 0xffff ||
- ((br == 0) &&
- ((READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE) &
- IFX_SSC_STATE_IS_MASTER) == 0))){
- local_irq_restore(flags);
- printk("%s: illegal baudrate %u\n", __FUNCTION__, baud);
- return -EINVAL;
- }
- WRITE_PERIPHERAL_REGISTER(br, info->mapbase + IFX_SSC_BR);
- if (enabled)
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_SET_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- local_irq_restore(flags);
- return 0;
-} // ifx_ssc_set_baud
-
-static int
-ifx_ssc_hwinit(struct ifx_ssc_port *info)
-{
- unsigned long flags;
- bool enabled;
-
- /* have to disable the SSC */
- enabled = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE)
- & IFX_SSC_STATE_IS_ENABLED) != 0;
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
-
- if (ifx_ssc_sethwopts(info) < 0)
- {
- printk("%s: setting the hardware options failed\n",
- __FUNCTION__);
- return -EINVAL;
- }
-
- if (ifx_ssc_set_baud(info, info->baud) < 0) {
- printk("%s: setting the baud rate failed\n", __FUNCTION__);
- return -EINVAL;
- }
- local_irq_save(flags);
- /* TX FIFO */
- WRITE_PERIPHERAL_REGISTER((IFX_SSC_DEF_TXFIFO_FL <<
- IFX_SSC_XFCON_ITL_OFFSET) |
- IFX_SSC_XFCON_FIFO_ENABLE,
- info->mapbase + IFX_SSC_TXFCON);
- /* RX FIFO */
- WRITE_PERIPHERAL_REGISTER((IFX_SSC_DEF_RXFIFO_FL <<
- IFX_SSC_XFCON_ITL_OFFSET) |
- IFX_SSC_XFCON_FIFO_ENABLE,
- info->mapbase + IFX_SSC_RXFCON);
- local_irq_restore(flags);
- if (enabled)
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_SET_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
- return 0;
-} // ifx_ssc_hwinit
-
-/*-----------------------------------------------------------------------------
- FUNC-NAME : ifx_ssc_batch_exec
- LONG-NAME :
- PURPOSE :
-
- PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
-
- RESULT : Returns error code
-
- REMARKS :
------------------------------------------------------------------------------*/
-static int
-ifx_ssc_batch_exec(struct ifx_ssc_port *info, struct ifx_ssc_batch_list *batch_anchor)
-{
- // ### TO DO: implement user space batch execution
- // first, copy the whole linked list from user to kernel space
- // save some hardware options
- // execute list
- // restore hardware options if selected
- return -EFAULT;
-} // ifx_ssc_batch_exec
-
-
-/*
- * This routine allows the driver to implement device-
- * specific ioctl's. If the ioctl number passed in cmd is
- * not recognized by the driver, it should return ENOIOCTLCMD.
- */
-int
-ifx_ssc_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long data)
-{
- struct ifx_ssc_port *info;
- int line, ret_val = 0;
- unsigned long flags;
- unsigned long tmp;
- int from_kernel = 0;
-
- if ((inode == (struct inode *)0) || (inode == (struct inode *)1))
- {
- from_kernel = 1;
- line = (int)inode;
- }
- else
- line = MINOR(filp->f_dentry->d_inode->i_rdev);
-
- /* don't use more minor devices than we can support */
- if (line < 0 || line >= PORT_CNT)
- return -ENXIO;
-
- info = &isp[line];
-
- switch (cmd) {
- case IFX_SSC_STATS_READ:
- /* data must be a pointer to a struct ifx_ssc_statistics */
- if (from_kernel)
- memcpy((void *)data, (void *)&info->stats,
- sizeof(struct ifx_ssc_statistics));
- else
- if (copy_to_user((void *)data,
- (void *)&info->stats,
- sizeof(struct ifx_ssc_statistics)))
- ret_val = -EFAULT;
- break;
- case IFX_SSC_STATS_RESET:
- /* just resets the statistics counters */
- memset((void *)&info->stats, 0, sizeof(struct ifx_ssc_statistics));
- break;
- case IFX_SSC_BAUD_SET:
- /* if the buffers are not empty then the port is */
- /* busy and we shouldn't change things on-the-fly! */
- if (!info->txbuf || !info->rxbuf ||
- (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE)
- & IFX_SSC_STATE_BUSY)) {
- ret_val = -EBUSY;
- break;
- }
- /* misuse flags */
- if (from_kernel)
- flags = *((unsigned long *)data);
- else
- if (copy_from_user((void *)&flags,
- (void *)data, sizeof(flags)))
- {
- ret_val = -EFAULT;
- break;
- }
- if (flags == 0)
- {
- ret_val = -EINVAL;
- break;
- }
- if (ifx_ssc_set_baud(info, flags) < 0)
- {
- ret_val = -EINVAL;
- break;
- }
- info->baud = flags;
- break;
- case IFX_SSC_BAUD_GET:
- if (from_kernel)
- *((unsigned int *)data) = info->baud;
- else
- if (copy_to_user((void *)data,
- (void *)&info->baud,
- sizeof(unsigned long)))
- ret_val = -EFAULT;
- break;
- case IFX_SSC_RXTX_MODE_SET:
- if (from_kernel)
- tmp = *((unsigned long *)data);
- else
- if (copy_from_user((void *)&tmp,
- (void *)data, sizeof(tmp))) {
- ret_val = -EFAULT;
- break;
- }
- ret_val = ifx_ssc_rxtx_mode_set(info, tmp);
- break;
- case IFX_SSC_RXTX_MODE_GET:
- tmp = READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_CON) &
- (~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF));
- if (from_kernel)
- *((unsigned int *)data) = tmp;
- else
- if (copy_to_user((void *)data,
- (void *)&tmp,
- sizeof(tmp)))
- ret_val = -EFAULT;
- break;
-
- case IFX_SSC_ABORT:
- ifx_ssc_abort(info);
- break;
-
- case IFX_SSC_GPO_OUT_SET:
- if (from_kernel)
- tmp = *((unsigned long *)data);
- else
- if (copy_from_user((void *)&tmp,
- (void *)data, sizeof(tmp))) {
- ret_val = -EFAULT;
- break;
- }
- if (tmp > IFX_SSC_MAX_GPO_OUT)
- ret_val = -EINVAL;
- else
- WRITE_PERIPHERAL_REGISTER
- (1<<(tmp + IFX_SSC_WHBGPOSTAT_SETOUT0_POS),
- info->mapbase + IFX_SSC_WHBGPOSTAT);
- break;
- case IFX_SSC_GPO_OUT_CLR:
- if (from_kernel)
- tmp = *((unsigned long *)data);
- else
- if (copy_from_user((void *)&tmp,
- (void *)data, sizeof(tmp))) {
- ret_val = -EFAULT;
- break;
- }
- if (tmp > IFX_SSC_MAX_GPO_OUT)
- ret_val = -EINVAL;
- else {
- WRITE_PERIPHERAL_REGISTER
- (1<<(tmp + IFX_SSC_WHBGPOSTAT_CLROUT0_POS),
- info->mapbase + IFX_SSC_WHBGPOSTAT);
- }
- break;
- case IFX_SSC_GPO_OUT_GET:
- tmp = READ_PERIPHERAL_REGISTER
- (info->mapbase + IFX_SSC_GPOSTAT);
- if (from_kernel)
- *((unsigned int *)data) = tmp;
- else
- if (copy_to_user((void *)data,
- (void *)&tmp,
- sizeof(tmp)))
- ret_val = -EFAULT;
- break;
- case IFX_SSC_FRM_STATUS_GET:
- ifx_ssc_frm_status_get(info);
- if (from_kernel)
- memcpy((void *)data, (void *)&info->frm_status,
- sizeof(struct ifx_ssc_frm_status));
- else
- if (copy_to_user((void *)data,
- (void *)&info->frm_status,
- sizeof(struct ifx_ssc_frm_status)))
- ret_val = -EFAULT;
- break;
- case IFX_SSC_FRM_CONTROL_GET:
- ifx_ssc_frm_control_get(info);
- if (from_kernel)
- memcpy((void *)data, (void *)&info->frm_opts,
- sizeof(struct ifx_ssc_frm_opts));
- else
- if (copy_to_user((void *)data,
- (void *)&info->frm_opts,
- sizeof(struct ifx_ssc_frm_opts)))
- ret_val = -EFAULT;
- break;
- case IFX_SSC_FRM_CONTROL_SET:
- if (from_kernel)
- memcpy((void *)&info->frm_opts, (void *)data,
- sizeof(struct ifx_ssc_frm_opts));
- else
- if (copy_to_user((void *)&info->frm_opts,
- (void *)data,
- sizeof(struct ifx_ssc_frm_opts))){
- ret_val = -EFAULT;
- break;
- }
- ret_val = ifx_ssc_frm_control_set(info);
- break;
- case IFX_SSC_HWOPTS_SET:
- /* data must be a pointer to a struct ifx_ssc_hwopts */
- /* if the buffers are not empty then the port is */
- /* busy and we shouldn't change things on-the-fly! */
- if (!info->txbuf || !info->rxbuf ||
- (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE)
- & IFX_SSC_STATE_BUSY)) {
- ret_val = -EBUSY;
- break;
- }
- if (from_kernel)
- memcpy((void *)&info->opts, (void *)data,
- sizeof(struct ifx_ssc_hwopts));
- else
- if (copy_from_user((void *)&info->opts,
- (void *)data,
- sizeof(struct ifx_ssc_hwopts)))
- {
- ret_val = -EFAULT;
- break;
- }
- if (ifx_ssc_hwinit(info) < 0)
- {
- ret_val = -EIO;
- }
- break;
- case IFX_SSC_HWOPTS_GET:
- /* data must be a pointer to a struct ifx_ssc_hwopts */
- if (from_kernel)
- memcpy((void *)data, (void *)&info->opts,
- sizeof(struct ifx_ssc_hwopts));
- else
- if (copy_to_user((void *)data,
- (void *)&info->opts,
- sizeof(struct ifx_ssc_hwopts)))
- ret_val = -EFAULT;
- break;
- default:
- ret_val = -ENOIOCTLCMD;
- }
-
- return ret_val;
-} /* ifx_ssc_ioctl */
-EXPORT_SYMBOL(ifx_ssc_ioctl);
-
-///* the poll routine */
-//static unsigned int
-//ifx_ssc_poll(struct file *filp, struct poll_table_struct *pts)
-//{
-// int unit = MINOR(filp->f_dentry->d_inode->i_rdev);
-// struct ifx_ssc_port *info;
-// unsigned int mask = 0;
-// int spc;
-//
-// info = &isp[unit];
-//
-// /* add event to the wait queues */
-// /* DO NOT FORGET TO DO A WAKEUP ON THESE !!!! */
-// poll_wait(filp, &info->pwait, pts);
-//
-// /* are there bytes in the RX SW-FIFO? */
-// if (info->rxrp != info->rxwp)
-// mask |= POLLIN | POLLRDNORM;
-//
-// /* free space in the TX SW-FIFO */
-// spc = info->txrp - info->txwp - 1;
-// if (spc < 0)
-// spc += TX_BUFSIZE;
-//#ifdef IFX_SSC_USEDMA
-// /* writing always works, except in the DMA case when all descriptors */
-// /* are used up */
-// if (unit == 1 && info->dma_freecnt == 0)
-// spc = 0;
-//#endif
-// if (spc > 0)
-// mask |= POLLOUT | POLLWRNORM;
-//
-// return (mask);
-//}
-
-static int
-ifx_ssc1_read_proc(char *page, char **start, off_t offset, int count, int *eof, void *data)
-{
- int off = 0;
- unsigned long flags;
-
- /* don't want any interrupts here */
- save_flags(flags);
- cli();
-
-
- /* print statistics */
- off += sprintf(page+off, "Statistics for Infineon Synchronous Serial Controller SSC1\n");
- off += sprintf(page+off, "RX overflow errors %d\n", isp[0].stats.rxOvErr);
- off += sprintf(page+off, "RX underflow errors %d\n", isp[0].stats.rxUnErr);
- off += sprintf(page+off, "TX overflow errors %d\n", isp[0].stats.txOvErr);
- off += sprintf(page+off, "TX underflow errors %d\n", isp[0].stats.txUnErr);
- off += sprintf(page+off, "Abort errors %d\n", isp[0].stats.abortErr);
- off += sprintf(page+off, "Mode errors %d\n", isp[0].stats.modeErr);
- off += sprintf(page+off, "RX Bytes %d\n", isp[0].stats.rxBytes);
- off += sprintf(page+off, "TX Bytes %d\n", isp[0].stats.txBytes);
-
- restore_flags (flags); /* XXXXX */
- *eof = 1;
- return (off);
-}
-
-
-/*
- * This routine prints out the appropriate serial driver version number
- */
-static inline void
-show_version(void)
-{
-#if 0
- printk("Infineon Technologies Synchronous Serial Controller (SSC) driver\n"
- " version %s - built %s %s\n", IFX_SSC_DRV_VERSION, __DATE__, __TIME__);
-#endif
-} /* show_version */
-
-
-/*
- * Due to the fact that a port can be dynamically switched between slave
- * and master mode using an IOCTL the hardware is not initialized here,
- * but in ifx_ssc_hwinit() as a result of an IOCTL.
- */
-int __init
-ifx_ssc_init(void)
-{
- struct ifx_ssc_port *info;
- int i, nbytes;
- unsigned long flags;
- int ret_val;
-
- // ### TO DO: dynamic port count evaluation due to pin multiplexing
-
- ret_val = -ENOMEM;
- nbytes = PORT_CNT * sizeof(struct ifx_ssc_port);
- isp = (struct ifx_ssc_port *)kmalloc(nbytes, GFP_KERNEL);
- if (isp == NULL)
- {
- printk("%s: no memory for isp\n", __FUNCTION__);
- return (ret_val);
- }
- memset(isp, 0, nbytes);
-
- show_version();
-
- /* register the device */
- ret_val = -ENXIO;
-/*
- i = maj;
-*/
- if ((i = register_chrdev(maj, "ssc", &ifx_ssc_fops)) < 0)
- {
- printk("Unable to register major %d for the Infineon SSC\n", maj);
- if (maj == 0){
- goto errout;
- }
- else{
- maj = 0;
- if ((i = register_chrdev(maj, "ssc", &ifx_ssc_fops)) < 0)
- {
- printk("Unable to register major %d for the Infineon SSC\n", maj);
- goto errout;
- }
- }
- }
- if (maj == 0) maj = i;
- //printk("registered major %d for Infineon SSC\n", maj);
-
- /* set default values in ifx_ssc_port */
- for (i = 0; i < PORT_CNT; i++) {
- info = &isp[i];
- info->port_nr = i;
- /* default values for the HwOpts */
- info->opts.AbortErrDetect = IFX_SSC_DEF_ABRT_ERR_DETECT;
- info->opts.rxOvErrDetect = IFX_SSC_DEF_RO_ERR_DETECT;
- info->opts.rxUndErrDetect = IFX_SSC_DEF_RU_ERR_DETECT;
- info->opts.txOvErrDetect = IFX_SSC_DEF_TO_ERR_DETECT;
- info->opts.txUndErrDetect = IFX_SSC_DEF_TU_ERR_DETECT;
- info->opts.loopBack = IFX_SSC_DEF_LOOP_BACK;
- info->opts.echoMode = IFX_SSC_DEF_ECHO_MODE;
- info->opts.idleValue = IFX_SSC_DEF_IDLE_DATA;
- info->opts.clockPolarity = IFX_SSC_DEF_CLOCK_POLARITY;
- info->opts.clockPhase = IFX_SSC_DEF_CLOCK_PHASE;
- info->opts.headingControl = IFX_SSC_DEF_HEADING_CONTROL;
- info->opts.dataWidth = IFX_SSC_DEF_DATA_WIDTH;
- info->opts.modeRxTx = IFX_SSC_DEF_MODE_RXTX;
- info->opts.gpoCs = IFX_SSC_DEF_GPO_CS;
- info->opts.gpoInv = IFX_SSC_DEF_GPO_INV;
- info->opts.masterSelect = IFX_SSC_DEF_MASTERSLAVE;
- info->baud = IFX_SSC_DEF_BAUDRATE;
- info->rxbuf = NULL;
- info->txbuf = NULL;
- /* values specific to SSC1 */
- if (i == 0) {
- info->mapbase = AMAZON_SSC_BASE_ADD_0;
- // ### TO DO: power management
-
- // setting interrupt vectors
- info->txirq = IFX_SSC_TIR;
- info->rxirq = IFX_SSC_RIR;
- info->errirq = IFX_SSC_EIR;
-/*
- info->frmirq = IFX_SSC_FIR;
-*/
- }
- /* activate SSC */
- /* CLC.DISS = 0 */
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_DEF_RMC << IFX_CLC_RUN_DIVIDER_OFFSET, info->mapbase + IFX_SSC_CLC);
-
-// ### TO DO: multiple instances
-
- init_waitqueue_head(&info->rwait);
- //init_waitqueue_head(&info->pwait);
-
- local_irq_save(flags);
-
- // init serial framing register
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_DEF_SFCON, info->mapbase + IFX_SSC_SFCON);
-
- /* try to get the interrupts */
- // ### TO DO: interrupt handling with multiple instances
- ret_val = ifx_int_wrapper.request(info->txirq, ifx_ssc_tx_int,
- 0, "ifx_ssc_tx", info);
- if (ret_val){
- printk("%s: unable to get irq %d\n", __FUNCTION__,
- info->txirq);
- local_irq_restore(flags);
- goto errout;
- }
- ret_val = ifx_int_wrapper.request(info->rxirq, ifx_ssc_rx_int,
- 0, "ifx_ssc_rx", info);
- if (ret_val){
- printk("%s: unable to get irq %d\n", __FUNCTION__,
- info->rxirq);
- local_irq_restore(flags);
- goto irqerr;
- }
- ret_val = ifx_int_wrapper.request(info->errirq, ifx_ssc_err_int,
- 0, "ifx_ssc_err", info);
- if (ret_val){
- printk("%s: unable to get irq %d\n", __FUNCTION__,
- info->errirq);
- local_irq_restore(flags);
- goto irqerr;
- }
-/*
- ret_val = ifx_int_wrapper.request(info->frmirq, ifx_ssc_frm_int,
- 0, "ifx_ssc_frm", info);
- if (ret_val){
- printk("%s: unable to get irq %d\n", __FUNCTION__,
- info->frmirq);
- local_irq_restore(flags);
- goto irqerr;
- }
-
-*/
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_DEF_IRNEN, info->mapbase + IFX_SSC_IRN_EN);
-
- local_irq_restore(flags);
- } // for (i = 0; i < PORT_CNT; i++)
-
- /* init the SSCs with default values */
- for (i = 0; i < PORT_CNT; i++)
- {
- info = &isp[i];
- if (ifx_ssc_hwinit(info) < 0)
- {
- printk("%s: hardware init failed for port %d\n",
- __FUNCTION__, i);
- goto irqerr;
- }
- }
-
- /* register /proc read handler */
- // ### TO DO: multiple instances
- /* for SSC1, which is always present */
- create_proc_read_entry("driver/ssc1", 0, NULL, ifx_ssc1_read_proc, NULL);
- return 0;
-
-irqerr:
- // ### TO DO: multiple instances
- ifx_int_wrapper.free(isp[0].txirq,&isp[0]);
- ifx_int_wrapper.free(isp[0].rxirq,&isp[0]);
- ifx_int_wrapper.free(isp[0].errirq,&isp[0]);
-/*
- ifx_int_wrapper.free(isp[0].frmirq, &isp[0]);
-*/
-errout:
- /* free up any allocated memory in the error case */
- kfree(isp);
- return (ret_val);
-} /* ifx_ssc_init */
-
-
-void
-ifx_ssc_cleanup_module(void)
-{
- int i;
-
- /* free up any allocated memory */
- for (i = 0; i < PORT_CNT; i++)
- {
- /* disable the SSC */
- WRITE_PERIPHERAL_REGISTER(IFX_SSC_WHBSTATE_CLR_ENABLE,isp[i].mapbase + IFX_SSC_WHBSTATE);
- /* free the interrupts */
- ifx_int_wrapper.free(isp[i].txirq, &isp[i]);
- ifx_int_wrapper.free(isp[i].rxirq, &isp[i]);
- ifx_int_wrapper.free(isp[i].errirq, &isp[i]);
-/*
- ifx_int_wrapper.free(isp[i].frmirq, &isp[i]);
-
- if (isp[i].rxbuf != NULL)
- kfree(isp[i].rxbuf);
- if (isp[i].txbuf != NULL)
- kfree(isp[i].txbuf);
-*/
- }
- kfree(isp);
- /* unregister the device */
- if (unregister_chrdev(maj, "ssc"))
- {
- printk("Unable to unregister major %d for the SSC\n", maj);
- }
- /* delete /proc read handler */
- remove_proc_entry("driver/ssc1", NULL);
- remove_proc_entry("driver/ssc2", NULL);
-} /* ifx_ssc_cleanup_module */
-
-module_exit(ifx_ssc_cleanup_module);
-
-/* Module entry-points */
-module_init(ifx_ssc_init);
-
-#ifndef MODULE
-static int __init
-ifx_ssc_set_maj(char *str)
-{
- maj = simple_strtol(str, NULL, 0);
- return 1;
-}
-__setup("ssc_maj=", ifx_ssc_set_maj);
-#endif /* !MODULE */
-
-#define AMAZON_SSC_EMSG(fmt,arg...) printk("%s: "fmt,__FUNCTION__, ##arg)
-/* Brief: chip select enable
- */
-inline int amazon_ssc_cs_low(u32 pin)
-{
- int ret=0;
- if ((ret=ifx_ssc_ioctl((struct inode *)0, NULL,IFX_SSC_GPO_OUT_CLR, (unsigned long)&pin))){
- AMAZON_SSC_EMSG("clear CS %d fails\n",pin);
- }
- wmb();
- return ret;
-}
-EXPORT_SYMBOL(amazon_ssc_cs_low);
-/* Brief: chip select disable
- */
-inline int amazon_ssc_cs_high(u32 pin)
-{
- int ret=0;
- if ((ret=ifx_ssc_ioctl((struct inode *)0, NULL,IFX_SSC_GPO_OUT_SET, (unsigned long)&pin))){
- AMAZON_SSC_EMSG("set CS %d fails\n", pin);
- }
- wmb();
- return ret;
-}
-EXPORT_SYMBOL(amazon_ssc_cs_high);
-/* Brief: one SSC session
- * Parameter:
- * tx_buf
- * tx_len
- * rx_buf
- * rx_len
- * session_mode: IFX_SSC_MODE_RXTX or IFX_SSC_MODE_TX
- * Return: >=0 number of bytes received (if rx_buf != 0) or transmitted
- * <0 error code
- * Description:
- * 0. copy data to internal buffer
- * 1. Write command
- * 2a. If SSC_SESSION_MODE_TXONLY, read tx_len data
- * 2b. If not Read back (tx_len + rx_len) data
- * 3. copy internal buffer to rx buf if necessary
- */
-static int ssc_session(char * tx_buf, u32 tx_len, char * rx_buf, u32 rx_len)
-{
- int ret=0;
-
- char * ssc_tx_buf=NULL;
- char * ssc_rx_buf=NULL;
-
-// volatile char ssc_tx_buf[128]={0};
-// volatile char ssc_rx_buf[128]={0};
-
- int eff_size=0;
- u8 mode=0;
-
- if (tx_buf == NULL && tx_len ==0 && rx_buf == NULL && rx_len == 0){
- AMAZON_SSC_EMSG("invalid parameters\n");
- ret=-EINVAL;
- goto ssc_session_exit;
- }else if (tx_buf == NULL || tx_len == 0){
- if (rx_buf != NULL && rx_len != 0){
- mode = IFX_SSC_MODE_RX;
- }else{
- AMAZON_SSC_EMSG("invalid parameters\n");
- ret=-EINVAL;
- goto ssc_session_exit;
- }
- }else if (rx_buf == NULL || rx_len ==0){
- if (tx_buf != NULL && tx_len != 0){
- mode = IFX_SSC_MODE_TX;
- }else{
- AMAZON_SSC_EMSG("invalid parameters\n");
- ret=-EINVAL;
- goto ssc_session_exit;
- }
- }else{
- mode = IFX_SSC_MODE_RXTX;
- }
-
- if (mode == IFX_SSC_MODE_RXTX){
- eff_size = tx_len + rx_len;
- }else if (mode == IFX_SSC_MODE_RX){
- eff_size = rx_len;
- }else{
- eff_size = tx_len;
- }
-
- //4 bytes alignment, required by driver
- /* change by TaiCheng */
- //if (in_irq()){
- if (1){
- ssc_tx_buf = (char*) kmalloc(sizeof(char) * ((eff_size + 3) & (~3)), GFP_ATOMIC);
- ssc_rx_buf = (char*) kmalloc(sizeof(char) * ((eff_size + 3) & (~3)), GFP_ATOMIC);
- }else{
- ssc_tx_buf = (char*) kmalloc(sizeof(char) * ((eff_size + 3) & (~3)), GFP_KERNEL);
- ssc_rx_buf = (char*) kmalloc(sizeof(char) * ((eff_size + 3) & (~3)), GFP_KERNEL);
- }
- if (ssc_tx_buf == NULL || ssc_rx_buf == NULL){
- AMAZON_SSC_EMSG("no memory for size of %d\n", eff_size);
- ret = -ENOMEM;
- goto ssc_session_exit;
- }
- memset((void*)ssc_tx_buf, 0, eff_size);
- memset((void*)ssc_rx_buf, 0, eff_size);
-
- if (tx_len>0){
- memcpy(ssc_tx_buf, tx_buf, tx_len);
- }
-
- ret=ifx_ssc_kwrite(0, ssc_tx_buf, eff_size);
-
- if (ret > 0) {
- ssc_tx_buf = NULL; //should be freed by ifx_ssc_kwrite
- }
-
- if ( ret != eff_size ){
- AMAZON_SSC_EMSG("ifx_ssc_write return %d\n",ret);
- goto ssc_session_exit;
- }
- ret=ifx_ssc_kread(0, ssc_rx_buf,eff_size);
- if ( ret != eff_size ){
- AMAZON_SSC_EMSG("ifx_ssc_read return %d\n",ret);
- goto ssc_session_exit;
- }
-
- memcpy(rx_buf, ssc_rx_buf+tx_len, rx_len);
-
- if (mode == IFX_SSC_MODE_TX) {
- ret = tx_len;
- }else{
- ret = rx_len;
- }
-ssc_session_exit:
-
- if (ssc_tx_buf != NULL) kfree(ssc_tx_buf);
- if (ssc_rx_buf != NULL) kfree(ssc_rx_buf);
-
- if (ret<0) {
- printk("ssc session fails\n");
- }
- return ret;
-}
-/* Brief: TX-RX session
- * Parameter:
- * tx_buf
- * tx_len
- * rx_buf
- * rx_len
- * Return: >=0 number of bytes received
- * <0 error code
- * Description:
- * 1. TX session
- * 2. RX session
- */
-int amazon_ssc_txrx(char * tx_buf, u32 tx_len, char * rx_buf, u32 rx_len)
-{
- return ssc_session(tx_buf,tx_len,rx_buf,rx_len);
-}
-EXPORT_SYMBOL(amazon_ssc_txrx);
-/* Brief: TX only session
- * Parameter:
- * tx_buf
- * tx_len
- * Return: >=0 number of bytes transmitted
- * <0 error code
- */
-int amazon_ssc_tx(char * tx_buf, u32 tx_len)
-{
- return ssc_session(tx_buf,tx_len,NULL,0);
-}
-EXPORT_SYMBOL(amazon_ssc_tx);
-/* Brief: RX only session
- * Parameter:
- * rx_buf
- * rx_len
- * Return: >=0 number of bytes received
- * <0 error code
- */
-int amazon_ssc_rx(char * rx_buf, u32 rx_len)
-{
- return ssc_session(NULL,0,rx_buf,rx_len);
-}
-EXPORT_SYMBOL(amazon_ssc_rx);
-
projects / openwrt / svn-archive / archive.git / blobdiff