X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/2c0b4a49174edd0b00eca8e71334957f9dccee0b..0a546c31b26044b1b6ad50307213c1d099b45def:/target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c?ds=sidebyside diff --git a/target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c b/target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c index 9f5c0047a..f8c5f3017 100644 --- a/target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c +++ b/target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c @@ -13,17 +13,19 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. * - * Copyright (C) 2006 infineon - * Copyright (C) 2007 John Crispin + * Copyright(C) 2006 infineon + * Copyright(C) 2007 John Crispin * */ -// ### 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 +/* +### 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 #include @@ -42,34 +44,23 @@ #include #include #include - -#include -#include -#include -#include -#include +#include +#include +#include +#include #include #include #include +#include #include #include #include #include -#ifdef SSC_FRAME_INT_ENABLE -#undef SSC_FRAME_INT_ENABLE -#endif - -#define not_yet - -#define SPI_VINETIC - - - /* allow the user to set the major device number */ -static int maj = 0; +static int maj; /* * This is the per-channel data structure containing pointers, flags @@ -78,121 +69,56 @@ static int maj = 0; */ 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 tx_int (struct ifx_ssc_port *); - -extern unsigned int ifxmips_get_fpi_hz (void); -extern void mask_and_ack_ifxmips_irq (unsigned int irq_nr); +static unsigned int ifx_ssc_get_kernel_clk(struct ifx_ssc_port *info); +static void tx_int(struct ifx_ssc_port *); -static struct file_operations ifx_ssc_fops = { - .owner = THIS_MODULE, - .read = ifx_ssc_read, - .write = ifx_ssc_write, - .ioctl = ifx_ssc_ioctl, - .open = ifx_ssc_open, - .release = ifx_ssc_close, -}; +extern unsigned int ifxmips_get_fpi_hz(void); +extern void ifxmips_mask_and_ack_irq(unsigned int irq_nr); -static inline unsigned int -ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info) +static inline unsigned int ifx_ssc_get_kernel_clk(struct ifx_ssc_port *info) { unsigned int rmc; - rmc = (readl(IFXMIPS_SSC_CLC) & IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET; - if (rmc == 0) - { - printk ("ifx_ssc_get_kernel_clk rmc==0 \n"); + rmc = (ifxmips_r32(IFXMIPS_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 ifxmips_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 */ -} - -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 + return ifxmips_get_fpi_hz() / rmc; } -#endif -#endif -inline static void -rx_int (struct ifx_ssc_port *info) +static inline 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 = (readl(IFXMIPS_SSC_FSTAT) & IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >> IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET; + fifo_fill_lev = (ifxmips_r32(IFXMIPS_SSC_FSTAT) & IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >> IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET; bytes_in_buf = info->rxbuf_end - info->rxbuf_ptr; - // transfer with 32 bits per entry + /* transfer with 32 bits per entry */ while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) { - tmp_ptr = (unsigned long *) info->rxbuf_ptr; - *tmp_ptr = readl(IFXMIPS_SSC_RB); + tmp_ptr = (unsigned long *)info->rxbuf_ptr; + *tmp_ptr = ifxmips_r32(IFXMIPS_SSC_RB); info->rxbuf_ptr += 4; info->stats.rxBytes += 4; fifo_fill_lev--; bytes_in_buf -= 4; } - // now do the rest as mentioned in STATE.RXBV + /* now do the rest as mentioned in STATE.RXBV */ while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) { - rx_valid_cnt = (readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_RX_BYTE_VALID_MASK) >> IFX_SSC_STATE_RX_BYTE_VALID_OFFSET; + rx_valid_cnt = (ifxmips_r32(IFXMIPS_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) rx_valid_cnt = bytes_in_buf; - tmp_val = readl(IFXMIPS_SSC_RB); + tmp_val = ifxmips_r32(IFXMIPS_SSC_RB); - for (i = 0; i < rx_valid_cnt; i++) - { + for (i = 0; i < rx_valid_cnt; i++) { *info->rxbuf_ptr = (tmp_val >> (8 * (rx_valid_cnt - i - 1))) & 0xff; bytes_in_buf--; info->rxbuf_ptr++; @@ -200,27 +126,24 @@ rx_int (struct ifx_ssc_port *info) info->stats.rxBytes += rx_valid_cnt; } - // check if transfer is complete - if (info->rxbuf_ptr >= info->rxbuf_end) - { - disable_irq(info->rxirq); - wake_up_interruptible (&info->rwait); - } else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && (readl(IFXMIPS_SSC_RXCNT) == 0)) - { + /* check if transfer is complete */ + if (info->rxbuf_ptr >= info->rxbuf_end) { + disable_irq(IFXMIPS_SSC_RIR); + wake_up_interruptible(&info->rwait); + } else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && (ifxmips_r32(IFXMIPS_SSC_RXCNT) == 0)) { if (info->rxbuf_end - info->rxbuf_ptr < IFX_SSC_RXREQ_BLOCK_SIZE) - writel((info->rxbuf_end - info->rxbuf_ptr) << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); + ifxmips_w32((info->rxbuf_end - info->rxbuf_ptr) << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); else - writel(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); + ifxmips_w32(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); } } -inline static void -tx_int (struct ifx_ssc_port *info) +static inline void tx_int(struct ifx_ssc_port *info) { int fifo_space, fill, i; - fifo_space = ((readl(IFXMIPS_SSC_ID) & IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET) - - ((readl(IFXMIPS_SSC_FSTAT) & IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >> IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET); + fifo_space = ((ifxmips_r32(IFXMIPS_SSC_ID) & IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET) + -((ifxmips_r32(IFXMIPS_SSC_FSTAT) & IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >> IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET); if (fifo_space == 0) return; @@ -230,72 +153,65 @@ tx_int (struct ifx_ssc_port *info) if (fill > fifo_space * 4) fill = fifo_space * 4; - for (i = 0; i < fill / 4; i++) - { - // at first 32 bit access - writel(*(UINT32 *) info->txbuf_ptr, IFXMIPS_SSC_TB); + for (i = 0; i < fill / 4; i++) { + /* at first 32 bit access */ + ifxmips_w32(*(UINT32 *)info->txbuf_ptr, IFXMIPS_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); + 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--; 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); + 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++; } - // check if transmission complete - if (info->txbuf_ptr >= info->txbuf_end) - { - disable_irq(info->txirq); - kfree (info->txbuf); + /* check if transmission complete */ + if (info->txbuf_ptr >= info->txbuf_end) { + disable_irq(IFXMIPS_SSC_TIR); + kfree(info->txbuf); info->txbuf = NULL; } } -irqreturn_t -ifx_ssc_rx_int (int irq, void *dev_id) +irqreturn_t ifx_ssc_rx_int(int irq, void *dev_id) { - struct ifx_ssc_port *info = (struct ifx_ssc_port *) dev_id; - rx_int (info); + struct ifx_ssc_port *info = (struct ifx_ssc_port *)dev_id; + rx_int(info); return IRQ_HANDLED; } -irqreturn_t -ifx_ssc_tx_int (int irq, void *dev_id) +irqreturn_t ifx_ssc_tx_int(int irq, void *dev_id) { - struct ifx_ssc_port *info = (struct ifx_ssc_port *) dev_id; - tx_int (info); + struct ifx_ssc_port *info = (struct ifx_ssc_port *)dev_id; + tx_int(info); return IRQ_HANDLED; } -irqreturn_t -ifx_ssc_err_int (int irq, void *dev_id) +irqreturn_t ifx_ssc_err_int(int irq, void *dev_id) { - struct ifx_ssc_port *info = (struct ifx_ssc_port *) dev_id; + 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 = readl(IFXMIPS_SSC_STATE); + local_irq_save(flags); + state = ifxmips_r32(IFXMIPS_SSC_STATE); if ((state & IFX_SSC_STATE_RX_UFL) != 0) { info->stats.rxUnErr++; @@ -323,60 +239,59 @@ ifx_ssc_err_int (int irq, void *dev_id) } if (write_back) - writel(write_back, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(write_back, IFXMIPS_SSC_WHBSTATE); - local_irq_restore (flags); + local_irq_restore(flags); return IRQ_HANDLED; } -static void -ifx_ssc_abort (struct ifx_ssc_port *info) +static void ifx_ssc_abort(struct ifx_ssc_port *info) { unsigned long flags; bool enabled; - local_irq_save (flags); - - disable_irq(info->rxirq); - disable_irq(info->txirq); - disable_irq(info->errirq); + local_irq_save(flags); - local_irq_restore (flags); + disable_irq(IFXMIPS_SSC_RIR); + disable_irq(IFXMIPS_SSC_TIR); + disable_irq(IFXMIPS_SSC_EIR); - // 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 = (readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED) != 0; - writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); - - // flush fifos - writel(IFX_SSC_XFCON_FIFO_FLUSH, IFXMIPS_SSC_TXFCON); - writel(IFX_SSC_XFCON_FIFO_FLUSH, IFXMIPS_SSC_RXFCON); + local_irq_restore(flags); - // free txbuf - if (info->txbuf != NULL) - { - kfree (info->txbuf); + /* 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 = (ifxmips_r32(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED) != 0; + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); + + /* flush fifos */ + ifxmips_w32(IFX_SSC_XFCON_FIFO_FLUSH, IFXMIPS_SSC_TXFCON); + ifxmips_w32(IFX_SSC_XFCON_FIFO_FLUSH, IFXMIPS_SSC_RXFCON); + + /* free txbuf */ + if (info->txbuf != NULL) { + kfree(info->txbuf); info->txbuf = NULL; } - // wakeup read process + /* wakeup read process */ if (info->rxbuf != NULL) - wake_up_interruptible (&info->rwait); + wake_up_interruptible(&info->rwait); - // clear pending int's - mask_and_ack_ifxmips_irq(info->rxirq); - mask_and_ack_ifxmips_irq(info->txirq); - mask_and_ack_ifxmips_irq(info->errirq); + /* clear pending int's */ + ifxmips_mask_and_ack_irq(IFXMIPS_SSC_RIR); + ifxmips_mask_and_ack_irq(IFXMIPS_SSC_TIR); + ifxmips_mask_and_ack_irq(IFXMIPS_SSC_EIR); - // clear error flags - writel(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE); + /* clear error flags */ + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE); if (enabled) - writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); } @@ -384,20 +299,17 @@ ifx_ssc_abort (struct ifx_ssc_port *info) * 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) +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)) { + 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; - } + } else + line = MINOR(filp->f_dentry->d_inode->i_rdev); /* don't open more minor devices than we can support */ if (line < 0 || line >= PORT_CNT) @@ -410,42 +322,41 @@ ifx_ssc_open (struct inode *inode, struct file *filp) return -EBUSY; info->port_is_open++; - disable_irq(info->rxirq); - disable_irq(info->txirq); - disable_irq(info->errirq); + disable_irq(IFXMIPS_SSC_RIR); + disable_irq(IFXMIPS_SSC_TIR); + disable_irq(IFXMIPS_SSC_EIR); /* Flush and enable TX/RX FIFO */ - writel((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_TXFCON); - writel((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_RXFCON); + ifxmips_w32((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_TXFCON); + ifxmips_w32((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_RXFCON); /* logically flush the software FIFOs */ info->rxbuf_ptr = 0; info->txbuf_ptr = 0; /* clear all error bits */ - writel(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE); - // clear pending interrupts - mask_and_ack_ifxmips_irq(info->rxirq); - mask_and_ack_ifxmips_irq(info->txirq); - mask_and_ack_ifxmips_irq(info->errirq); + /* clear pending interrupts */ + ifxmips_mask_and_ack_irq(IFXMIPS_SSC_RIR); + ifxmips_mask_and_ack_irq(IFXMIPS_SSC_TIR); + ifxmips_mask_and_ack_irq(IFXMIPS_SSC_EIR); - writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); return 0; } EXPORT_SYMBOL(ifx_ssc_open); -int -ifx_ssc_close (struct inode *inode, struct file *filp) +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)) + if ((inode == (struct inode *)0) || (inode == (struct inode *)1)) idx = (int) inode; else - idx = MINOR (filp->f_dentry->d_inode->i_rdev); + idx = MINOR(filp->f_dentry->d_inode->i_rdev); if (idx < 0 || idx >= PORT_CNT) return -ENXIO; @@ -454,7 +365,7 @@ ifx_ssc_close (struct inode *inode, struct file *filp) if (!info) return -ENXIO; - writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); ifx_ssc_abort(info); @@ -464,26 +375,25 @@ ifx_ssc_close (struct inode *inode, struct file *filp) } EXPORT_SYMBOL(ifx_ssc_close); -static ssize_t -ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel) +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); + local_irq_save(flags); info->rxbuf_ptr = info->rxbuf; info->rxbuf_end = info->rxbuf + len; - local_irq_restore (flags); + local_irq_restore(flags); /* Vinetic driver always works in IFX_SSC_MODE_RXTX */ /* TXRX in poll mode */ - while (info->rxbuf_ptr < info->rxbuf_end) - { + while (info->rxbuf_ptr < info->rxbuf_end) { if (info->txbuf_ptr < info->txbuf_end) - tx_int (info); + tx_int(info); - rx_int (info); + rx_int(info); }; ret_val = info->rxbuf_ptr - info->rxbuf; @@ -491,59 +401,56 @@ ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len, int return ret_val; } -static ssize_t -ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel) +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); + DECLARE_WAITQUEUE(wait, current); if (info->opts.modeRxTx == IFX_SSC_MODE_TX) return -EFAULT; - local_irq_save (flags); + 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", __func__); + 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", __func__); return -EFAULT; } local_irq_restore(flags); - tx_int (info); + tx_int(info); if (info->txbuf_ptr < info->txbuf_end) - enable_irq(info->txirq); + enable_irq(IFXMIPS_SSC_TIR); - enable_irq(info->rxirq); + enable_irq(IFXMIPS_SSC_RIR); } else { local_irq_restore(flags); - if (readl(IFXMIPS_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK) + if (ifxmips_r32(IFXMIPS_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK) return -EBUSY; - enable_irq(info->rxirq); + enable_irq(IFXMIPS_SSC_RIR); if (len < IFX_SSC_RXREQ_BLOCK_SIZE) - writel(len << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); + ifxmips_w32(len << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); else - writel(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); + ifxmips_w32(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ); } - __add_wait_queue (&info->rwait, &wait); - set_current_state (TASK_INTERRUPTIBLE); + __add_wait_queue(&info->rwait, &wait); + set_current_state(TASK_INTERRUPTIBLE); do { - local_irq_save (flags); + local_irq_save(flags); if (info->rxbuf_ptr >= info->rxbuf_end) break; - local_irq_restore (flags); + local_irq_restore(flags); - if (signal_pending (current)) - { + if (signal_pending(current)) { ret_val = -ERESTARTSYS; goto out; } @@ -551,38 +458,33 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, int from_ } while (1); ret_val = info->rxbuf_ptr - info->rxbuf; - local_irq_restore (flags); + local_irq_restore(flags); out: current->state = TASK_RUNNING; - __remove_wait_queue (&info->rwait, &wait); + __remove_wait_queue(&info->rwait, &wait); - return (ret_val); + return ret_val; } -static ssize_t -ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf, - size_t len, int from_kernel) +static ssize_t ifx_ssc_write_helper(struct ifx_ssc_port *info, const char *buf, + size_t len, int from_kernel) { if (info->opts.modeRxTx == IFX_SSC_MODE_RX) return -EFAULT; info->txbuf_ptr = info->txbuf; info->txbuf_end = len + info->txbuf; - if (info->opts.modeRxTx == IFX_SSC_MODE_TX) - { - tx_int (info); + if (info->opts.modeRxTx == IFX_SSC_MODE_TX) { + tx_int(info); if (info->txbuf_ptr < info->txbuf_end) - { - enable_irq(info->txirq); - } + enable_irq(IFXMIPS_SSC_TIR); } return len; } -ssize_t -ifx_ssc_kread (int port, char *kbuf, size_t len) +ssize_t ifx_ssc_kread(int port, char *kbuf, size_t len) { struct ifx_ssc_port *info; ssize_t ret_val; @@ -595,30 +497,27 @@ ifx_ssc_kread (int port, char *kbuf, size_t len) info = &isp[port]; - if (info->rxbuf != NULL) - { - printk ("SSC device busy\n"); + if (info->rxbuf != NULL) { + printk("SSC device busy\n"); return -EBUSY; } info->rxbuf = kbuf; - if (info->rxbuf == NULL) - { - printk ("SSC device error\n"); + if (info->rxbuf == NULL) { + printk("SSC device error\n"); return -EINVAL; } - ret_val = ifx_ssc_read_helper_poll (info, kbuf, len, 1); + ret_val = ifx_ssc_read_helper_poll(info, kbuf, len, 1); info->rxbuf = NULL; - disable_irq(info->rxirq); + disable_irq(IFXMIPS_SSC_RIR); return ret_val; } EXPORT_SYMBOL(ifx_ssc_kread); -ssize_t -ifx_ssc_kwrite (int port, const char *kbuf, size_t len) +ssize_t ifx_ssc_kwrite(int port, const char *kbuf, size_t len) { struct ifx_ssc_port *info; ssize_t ret_val; @@ -631,13 +530,13 @@ ifx_ssc_kwrite (int port, const char *kbuf, size_t len) info = &isp[port]; - // check if transmission in progress + /* check if transmission in progress */ if (info->txbuf != NULL) return -EBUSY; - info->txbuf = (char *) kbuf; + info->txbuf = (char *)kbuf; - ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 1); + ret_val = ifx_ssc_write_helper(info, info->txbuf, len, 1); if (ret_val < 0) info->txbuf = NULL; @@ -646,94 +545,88 @@ ifx_ssc_kwrite (int port, const char *kbuf, size_t len) } EXPORT_SYMBOL(ifx_ssc_kwrite); -static ssize_t -ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off) +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; - idx = MINOR (filp->f_dentry->d_inode->i_rdev); + idx = MINOR(filp->f_dentry->d_inode->i_rdev); info = &isp[idx]; if (info->rxbuf != NULL) return -EBUSY; - info->rxbuf = kmalloc (len + 3, GFP_KERNEL); + info->rxbuf = kmalloc(len + 3, GFP_KERNEL); if (info->rxbuf == NULL) return -ENOMEM; - ret_val = ifx_ssc_read_helper (info, info->rxbuf, len, 0); - if (copy_to_user ((void *) ubuf, info->rxbuf, ret_val) != 0) + ret_val = ifx_ssc_read_helper(info, info->rxbuf, len, 0); + if (copy_to_user((void *)ubuf, info->rxbuf, ret_val) != 0) ret_val = -EFAULT; - disable_irq(info->rxirq); + disable_irq(IFXMIPS_SSC_RIR); - kfree (info->rxbuf); + kfree(info->rxbuf); info->rxbuf = NULL; - return (ret_val); + return ret_val; } -static ssize_t -ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off) +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); + return 0; - idx = MINOR (filp->f_dentry->d_inode->i_rdev); + idx = MINOR(filp->f_dentry->d_inode->i_rdev); info = &isp[idx]; if (info->txbuf != NULL) return -EBUSY; - info->txbuf = kmalloc (len + 3, GFP_KERNEL); + info->txbuf = kmalloc(len + 3, GFP_KERNEL); if (info->txbuf == NULL) return -ENOMEM; - ret_val = copy_from_user (info->txbuf, ubuf, len); + ret_val = copy_from_user(info->txbuf, ubuf, len); if (ret_val == 0) - ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 0); + ret_val = ifx_ssc_write_helper(info, info->txbuf, len, 0); else ret_val = -EFAULT; - if (ret_val < 0) - { - kfree (info->txbuf); + if (ret_val < 0) { + kfree(info->txbuf); info->txbuf = NULL; } - return (ret_val); + return ret_val; } -static struct ifx_ssc_frm_status * -ifx_ssc_frm_status_get (struct ifx_ssc_port *info) +static struct ifx_ssc_frm_status *ifx_ssc_frm_status_get(struct ifx_ssc_port *info) { unsigned long tmp; - tmp = readl(IFXMIPS_SSC_SFSTAT); + tmp = ifxmips_r32(IFXMIPS_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 = readl(IFXMIPS_SSC_SFCON); + tmp = ifxmips_r32(IFXMIPS_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; } - -static struct ifx_ssc_frm_opts * -ifx_ssc_frm_control_get (struct ifx_ssc_port *info) +static struct ifx_ssc_frm_opts *ifx_ssc_frm_control_get(struct ifx_ssc_port *info) { unsigned long tmp; - tmp = readl(IFXMIPS_SSC_SFCON); + tmp = ifxmips_r32(IFXMIPS_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; @@ -744,12 +637,10 @@ ifx_ssc_frm_control_get (struct ifx_ssc_port *info) return &info->frm_opts; } -static int -ifx_ssc_frm_control_set (struct ifx_ssc_port *info) +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) @@ -758,12 +649,12 @@ ifx_ssc_frm_control_set (struct ifx_ssc_port *info) || (info->frm_opts.IdleClock & ~(IFX_SSC_SFCON_PAUSE_CLOCK_MASK >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET))) return -EINVAL; - // read interrupt bits (they're not changed here) - tmp = readl(IFXMIPS_SSC_SFCON) & + /* read interrupt bits(they're not changed here) */ + tmp = ifxmips_r32(IFXMIPS_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) + /* 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; @@ -771,32 +662,30 @@ ifx_ssc_frm_control_set (struct ifx_ssc_port *info) tmp |= info->frm_opts.FrameEnable * IFX_SSC_SFCON_SF_ENABLE; tmp |= info->frm_opts.StopAfterPause * IFX_SSC_SFCON_STOP_AFTER_PAUSE; - writel(tmp, IFXMIPS_SSC_SFCON); + ifxmips_w32(tmp, IFXMIPS_SSC_SFCON); return 0; } -static int -ifx_ssc_rxtx_mode_set (struct ifx_ssc_port *info, unsigned int val) +static int ifx_ssc_rxtx_mode_set(struct ifx_ssc_port *info, unsigned int val) { unsigned long tmp; if (!(info) || (val & ~(IFX_SSC_MODE_MASK))) return -EINVAL; - if ((readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_BUSY) - || (readl(IFXMIPS_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)) + if ((ifxmips_r32(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_BUSY) + || (ifxmips_r32(IFXMIPS_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)) return -EBUSY; - tmp = (readl(IFXMIPS_SSC_CON) & ~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val); - writel(tmp, IFXMIPS_SSC_SFCON); + tmp = (ifxmips_r32(IFXMIPS_SSC_CON) & ~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val); + ifxmips_w32(tmp, IFXMIPS_SSC_SFCON); info->opts.modeRxTx = val; return 0; } -static int -ifx_ssc_sethwopts (struct ifx_ssc_port *info) +static int ifx_ssc_sethwopts(struct ifx_ssc_port *info) { unsigned long flags, bits; struct ifx_ssc_hwopts *opts = &info->opts; @@ -827,8 +716,7 @@ ifx_ssc_sethwopts (struct ifx_ssc_port *info) if (opts->clockPolarity) bits |= IFX_SSC_CON_CLOCK_FALL; - switch (opts->modeRxTx) - { + switch (opts->modeRxTx) { case IFX_SSC_MODE_TX: bits |= IFX_SSC_CON_RX_OFF; break; @@ -837,27 +725,27 @@ ifx_ssc_sethwopts (struct ifx_ssc_port *info) break; } - local_irq_save (flags); + local_irq_save(flags); - writel(bits, IFXMIPS_SSC_CON); - writel((info->opts.gpoCs << IFX_SSC_GPOCON_ISCSB0_POS) | - (info->opts.gpoInv << IFX_SSC_GPOCON_INVOUT0_POS), IFXMIPS_SSC_GPOCON); + ifxmips_w32(bits, IFXMIPS_SSC_CON); + ifxmips_w32((info->opts.gpoCs << IFX_SSC_GPOCON_ISCSB0_POS) | + (info->opts.gpoInv << IFX_SSC_GPOCON_INVOUT0_POS), IFXMIPS_SSC_GPOCON); - writel(info->opts.gpoCs << IFX_SSC_WHBGPOSTAT_SETOUT0_POS, IFXMIPS_SSC_WHBGPOSTAT); + ifxmips_w32(info->opts.gpoCs << IFX_SSC_WHBGPOSTAT_SETOUT0_POS, IFXMIPS_SSC_WHBGPOSTAT); - //master mode + /* master mode */ if (opts->masterSelect) - writel(IFX_SSC_WHBSTATE_SET_MASTER_SELECT, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_SET_MASTER_SELECT, IFXMIPS_SSC_WHBSTATE); else - writel(IFX_SSC_WHBSTATE_CLR_MASTER_SELECT, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_MASTER_SELECT, IFXMIPS_SSC_WHBSTATE); - // init serial framing - writel(0, IFXMIPS_SSC_SFCON); + /* init serial framing */ + ifxmips_w32(0, IFXMIPS_SSC_SFCON); /* set up the port pins */ - //check for general requirements to switch (external) pad/pin characteristics + /* check for general requirements to switch(external) pad/pin characteristics */ /* TODO: P0.9 SPI_CS4, P0.10 SPI_CS5, P 0.11 SPI_CS6, because of ASC0 */ /* p0.15 SPI_CS1(EEPROM), P0.13 SPI_CS3, */ - /* Set p0.15 to alternative 01, others to 00 (In/OUT) */ + /* Set p0.15 to alternative 01, others to 00(In/OUT) */ *(IFXMIPS_GPIO_P0_DIR) = (*IFXMIPS_GPIO_P0_DIR) | (0xA000); *(IFXMIPS_GPIO_P0_ALTSEL0) = (((*IFXMIPS_GPIO_P0_ALTSEL0) | (0x8000)) & (~(0x2000))); *(IFXMIPS_GPIO_P0_ALTSEL1) = (((*IFXMIPS_GPIO_P0_ALTSEL1) & (~0x8000)) & (~(0x2000))); @@ -873,13 +761,12 @@ ifx_ssc_sethwopts (struct ifx_ssc_port *info) /*TODO: CS4 CS5 CS6 */ *IFXMIPS_GPIO_P0_OUT = ((*IFXMIPS_GPIO_P0_OUT) | 0x2000); - local_irq_restore (flags); + local_irq_restore(flags); return 0; } -static int -ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud) +static int ifx_ssc_set_baud(struct ifx_ssc_port *info, unsigned int baud) { unsigned int ifx_ssc_clock; unsigned int br; @@ -888,31 +775,30 @@ ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud) int retval = 0; ifx_ssc_clock = ifx_ssc_get_kernel_clk(info); - if (ifx_ssc_clock == 0) - { + if (ifx_ssc_clock == 0) { retval = -EINVAL; goto out; } - local_irq_save (flags); + local_irq_save(flags); - enabled = (readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED); - writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); + enabled = (ifxmips_r32(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED); + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); br = (((ifx_ssc_clock >> 1) + baud / 2) / baud) - 1; wmb(); if (br > 0xffff || ((br == 0) && - ((readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_MASTER) == 0))) { - local_irq_restore (flags); - printk ("%s: invalid baudrate %u\n", __func__, baud); + ((ifxmips_r32(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_MASTER) == 0))) { + local_irq_restore(flags); + printk("%s: invalid baudrate %u\n", __func__, baud); return -EINVAL; } - writel(br, IFXMIPS_SSC_BR); + ifxmips_w32(br, IFXMIPS_SSC_BR); if (enabled) - writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); local_irq_restore(flags); @@ -920,44 +806,41 @@ out: return retval; } -static int -ifx_ssc_hwinit (struct ifx_ssc_port *info) +static int ifx_ssc_hwinit(struct ifx_ssc_port *info) { unsigned long flags; bool enabled; - enabled = (readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED); - writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); + enabled = (ifxmips_r32(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED); + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); - if (ifx_ssc_sethwopts (info) < 0) - { - printk ("%s: setting the hardware options failed\n", __func__); + if (ifx_ssc_sethwopts(info) < 0) { + printk("%s: setting the hardware options failed\n", __func__); return -EINVAL; } - if (ifx_ssc_set_baud (info, info->baud) < 0) - { - printk ("%s: setting the baud rate failed\n", __func__); + if (ifx_ssc_set_baud(info, info->baud) < 0) { + printk("%s: setting the baud rate failed\n", __func__); return -EINVAL; } - local_irq_save (flags); + local_irq_save(flags); /* TX FIFO */ - writel((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_TXFCON); + ifxmips_w32((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_TXFCON); /* RX FIFO */ - writel((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_RXFCON); + ifxmips_w32((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_RXFCON); - local_irq_restore (flags); + local_irq_restore(flags); if (enabled) - writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); + ifxmips_w32(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE); return 0; } -int -ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data) +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; @@ -965,49 +848,46 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne unsigned long tmp; int from_kernel = 0; - if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1)) - { + 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); - } + } else + line = MINOR(filp->f_dentry->d_inode->i_rdev); if (line < 0 || line >= PORT_CNT) return -ENXIO; info = &isp[line]; - switch (cmd) - { + 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))) + 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)); + 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 || - (readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_BUSY)) { + (ifxmips_r32(IFXMIPS_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))) { + flags = *((unsigned long *)data); + else if (copy_from_user((void *)&flags, + (void *)data, sizeof(flags))) { ret_val = -EFAULT; break; } @@ -1015,7 +895,7 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne ret_val = -EINVAL; break; } - if (ifx_ssc_set_baud (info, flags) < 0) { + if (ifx_ssc_set_baud(info, flags) < 0) { ret_val = -EINVAL; break; } @@ -1023,134 +903,132 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne 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))) + *((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))) { + 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); + ret_val = ifx_ssc_rxtx_mode_set(info, tmp); break; case IFX_SSC_RXTX_MODE_GET: - tmp = readl(IFXMIPS_SSC_CON) & + tmp = ifxmips_r32(IFXMIPS_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))) + *((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); + 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))) { + 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 - writel(1 << (tmp + IFX_SSC_WHBGPOSTAT_SETOUT0_POS), + ifxmips_w32(1 << (tmp + IFX_SSC_WHBGPOSTAT_SETOUT0_POS), IFXMIPS_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))) { + 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 { - writel(1 << (tmp + IFX_SSC_WHBGPOSTAT_CLROUT0_POS), + else + ifxmips_w32(1 << (tmp + IFX_SSC_WHBGPOSTAT_CLROUT0_POS), IFXMIPS_SSC_WHBGPOSTAT); - } break; case IFX_SSC_GPO_OUT_GET: - tmp = readl(IFXMIPS_SSC_GPOSTAT); + tmp = ifxmips_r32(IFXMIPS_SSC_GPOSTAT); if (from_kernel) - *((unsigned int *) data) = tmp; - else if (copy_to_user ((void *) data, - (void *) &tmp, sizeof (tmp))) + *((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); + 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))) + 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); + 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))) + 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))) { + 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); + 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 || - (readl(IFXMIPS_SSC_STATE) + (ifxmips_r32(IFXMIPS_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))) { + 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) { + 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))) + 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: @@ -1161,8 +1039,16 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne } EXPORT_SYMBOL(ifx_ssc_ioctl); -int __init -ifx_ssc_init (void) +static struct file_operations ifx_ssc_fops = { + .owner = THIS_MODULE, + .read = ifx_ssc_read, + .write = ifx_ssc_write, + .ioctl = ifx_ssc_ioctl, + .open = ifx_ssc_open, + .release = ifx_ssc_close, +}; + +int __init ifx_ssc_init(void) { struct ifx_ssc_port *info; int i, nbytes; @@ -1171,27 +1057,25 @@ ifx_ssc_init (void) ret_val = -ENOMEM; nbytes = PORT_CNT * sizeof(struct ifx_ssc_port); - isp = (struct ifx_ssc_port*)kmalloc(nbytes, GFP_KERNEL); + isp = kmalloc(nbytes, GFP_KERNEL); - if (isp == NULL) - { + if (isp == NULL) { printk("%s: no memory for isp\n", __func__); - return (ret_val); + return ret_val; } memset(isp, 0, nbytes); ret_val = -ENXIO; - 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) - { + i = register_chrdev(maj, "ssc", &ifx_ssc_fops); + if (i < 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); + i = register_chrdev(maj, "ssc", &ifx_ssc_fops); + if (i < 0) { + printk("Unable to register major %d for the Infineon SSC\n", maj); goto errout; } } @@ -1225,59 +1109,53 @@ ifx_ssc_init (void) info->rxbuf = NULL; info->txbuf = NULL; /* values specific to SSC1 */ - if (i == 0) { + if (i == 0) info->mapbase = IFXMIPS_SSC_BASE_ADDR; - info->txirq = IFXMIPS_SSC_TIR; - info->rxirq = IFXMIPS_SSC_RIR; - info->errirq = IFXMIPS_SSC_EIR; - } - writel(IFX_SSC_DEF_RMC << IFX_CLC_RUN_DIVIDER_OFFSET, IFXMIPS_SSC_CLC); + ifxmips_w32(IFX_SSC_DEF_RMC << IFX_CLC_RUN_DIVIDER_OFFSET, IFXMIPS_SSC_CLC); - init_waitqueue_head (&info->rwait); + init_waitqueue_head(&info->rwait); - local_irq_save (flags); + local_irq_save(flags); - // init serial framing register - writel(IFX_SSC_DEF_SFCON, IFXMIPS_SSC_SFCON); + /* init serial framing register */ + ifxmips_w32(IFX_SSC_DEF_SFCON, IFXMIPS_SSC_SFCON); - ret_val = request_irq(info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info); - if (ret_val) - { - printk("%s: unable to get irq %d\n", __func__, info->txirq); + ret_val = request_irq(IFXMIPS_SSC_TIR, ifx_ssc_tx_int, IRQF_DISABLED, "ifx_ssc_tx", info); + if (ret_val) { + printk("%s: unable to get irq %d\n", __func__, IFXMIPS_SSC_TIR); local_irq_restore(flags); goto errout; } - ret_val = request_irq(info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info); - if (ret_val) - { - printk ("%s: unable to get irq %d\n", __func__, info->rxirq); - local_irq_restore (flags); + ret_val = request_irq(IFXMIPS_SSC_RIR, ifx_ssc_rx_int, IRQF_DISABLED, "ifx_ssc_rx", info); + if (ret_val) { + printk("%s: unable to get irq %d\n", __func__, IFXMIPS_SSC_RIR); + local_irq_restore(flags); goto irqerr; } - ret_val = request_irq(info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info); - if (ret_val) - { - printk ("%s: unable to get irq %d\n", __func__, info->errirq); - local_irq_restore (flags); + ret_val = request_irq(IFXMIPS_SSC_EIR, ifx_ssc_err_int, IRQF_DISABLED, "ifx_ssc_err", info); + if (ret_val) { + printk("%s: unable to get irq %d\n", __func__, IFXMIPS_SSC_EIR); + local_irq_restore(flags); goto irqerr; } - writel(IFX_SSC_DEF_IRNEN, IFXMIPS_SSC_IRN); + ifxmips_w32(IFX_SSC_DEF_IRNEN, IFXMIPS_SSC_IRN); - enable_irq(info->txirq); - enable_irq(info->rxirq); - enable_irq(info->errirq); + #if 0 + enable_irq(IFXMIPS_SSC_TIR); + enable_irq(IFXMIPS_SSC_RIR); + enable_irq(IFXMIPS_SSC_EIR); + #endif - local_irq_restore (flags); + local_irq_restore(flags); } 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", __func__, i); + if (ifx_ssc_hwinit(info) < 0) { + printk("%s: hardware init failed for port %d\n", __func__, i); goto irqerr; } } @@ -1286,58 +1164,55 @@ ifx_ssc_init (void) return 0; irqerr: - free_irq(isp[0].txirq, &isp[0]); - free_irq(isp[0].rxirq, &isp[0]); - free_irq(isp[0].errirq, &isp[0]); + free_irq(IFXMIPS_SSC_TIR, &isp[0]); + free_irq(IFXMIPS_SSC_RIR, &isp[0]); + free_irq(IFXMIPS_SSC_EIR, &isp[0]); errout: - kfree (isp); - return (ret_val); + kfree(isp); + return ret_val; } -void -ifx_ssc_cleanup_module (void) +void __exit ifx_ssc_cleanup_module(void) { int i; for (i = 0; i < PORT_CNT; i++) { - writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); - free_irq(isp[i].txirq, &isp[i]); - free_irq(isp[i].rxirq, &isp[i]); - free_irq(isp[i].errirq, &isp[i]); + ifxmips_w32(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE); + free_irq(IFXMIPS_SSC_TIR, &isp[i]); + free_irq(IFXMIPS_SSC_RIR, &isp[i]); + free_irq(IFXMIPS_SSC_EIR, &isp[i]); } - kfree (isp); + kfree(isp); } module_init(ifx_ssc_init); module_exit(ifx_ssc_cleanup_module); - -inline int -ifx_ssc_cs_low (u32 pin) +inline int ifx_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))) - printk ("clear CS %d fails\n", pin); - wmb (); + ret = ifx_ssc_ioctl((struct inode *)0, NULL, IFX_SSC_GPO_OUT_CLR, (unsigned long) &pin); + if (ret) + printk("clear CS %d fails\n", pin); + wmb(); return ret; } EXPORT_SYMBOL(ifx_ssc_cs_low); -inline int -ifx_ssc_cs_high (u32 pin) +inline int ifx_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))) - printk ("set CS %d fails\n", pin); - wmb (); + ret = ifx_ssc_ioctl((struct inode *)0, NULL, IFX_SSC_GPO_OUT_SET, (unsigned long) &pin); + if (ret) + printk("set CS %d fails\n", pin); + wmb(); return ret; } EXPORT_SYMBOL(ifx_ssc_cs_high); -static int -ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len) +static int ssc_session(char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len) { int ret = 0; @@ -1347,132 +1222,100 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len) u8 mode = 0; if (tx_buf == NULL && tx_len == 0 && rx_buf == NULL && rx_len == 0) { - printk ("invalid parameters\n"); + printk("invalid parameters\n"); ret = -EINVAL; goto ssc_session_exit; - } - else if (tx_buf == NULL || tx_len == 0) { + } else if (tx_buf == NULL || tx_len == 0) { if (rx_buf != NULL && rx_len != 0) { mode = IFX_SSC_MODE_RX; - } - else { - printk ("invalid parameters\n"); + } else { + printk("invalid parameters\n"); ret = -EINVAL; goto ssc_session_exit; } - } - else if (rx_buf == NULL || rx_len == 0) { - if (tx_buf != NULL && tx_len != 0) { + } else if (rx_buf == NULL || rx_len == 0) { + if (tx_buf != NULL && tx_len != 0) mode = IFX_SSC_MODE_TX; - } else { - printk ("invalid parameters\n"); + printk("invalid parameters\n"); ret = -EINVAL; goto ssc_session_exit; } - } - else { + } else mode = IFX_SSC_MODE_RXTX; - } - if (mode == IFX_SSC_MODE_RXTX) { + if (mode == IFX_SSC_MODE_RXTX) eff_size = tx_len + rx_len; - } - else if (mode == IFX_SSC_MODE_RX) { + else if (mode == IFX_SSC_MODE_RX) eff_size = rx_len; - } - else { + 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); - } + /* 4 bytes alignment, required by driver */ + ssc_tx_buf = kmalloc(sizeof(char) * + ((eff_size + 3) & (~3)), + GFP_ATOMIC); + ssc_rx_buf = kmalloc(sizeof(char) * + ((eff_size + 3) & (~3)), + GFP_ATOMIC); if (ssc_tx_buf == NULL || ssc_rx_buf == NULL) { - printk ("no memory for size of %d\n", eff_size); + printk("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); + 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); - } + if (tx_len > 0) + memcpy(ssc_tx_buf, tx_buf, tx_len); - ret = ifx_ssc_kwrite (0, ssc_tx_buf, eff_size); + 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 > 0) + ssc_tx_buf = NULL; /* should be freed by ifx_ssc_kwrite */ if (ret != eff_size) { - printk ("ifx_ssc_write return %d\n", ret); + printk("ifx_ssc_write return %d\n", ret); goto ssc_session_exit; } - ret = ifx_ssc_kread (0, ssc_rx_buf, eff_size); + ret = ifx_ssc_kread(0, ssc_rx_buf, eff_size); if (ret != eff_size) { - printk ("ifx_ssc_read return %d\n", ret); + printk("ifx_ssc_read return %d\n", ret); goto ssc_session_exit; } - memcpy (rx_buf, ssc_rx_buf + tx_len, rx_len); + memcpy(rx_buf, ssc_rx_buf + tx_len, rx_len); - if (mode == IFX_SSC_MODE_TX) { + if (mode == IFX_SSC_MODE_TX) ret = tx_len; - } - else { + else ret = rx_len; - } - ssc_session_exit: +ssc_session_exit: if (ssc_tx_buf != NULL) - kfree (ssc_tx_buf); + kfree(ssc_tx_buf); if (ssc_rx_buf != NULL) - kfree (ssc_rx_buf); + kfree(ssc_rx_buf); + + if (ret < 0) + printk("ssc session fails\n"); - if (ret < 0) { - printk ("ssc session fails\n"); - } return ret; } -int -ifx_ssc_txrx (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len) +int ifx_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(ifx_ssc_txrx); -int -ifx_ssc_tx (char *tx_buf, u32 tx_len) +int ifx_ssc_tx(char *tx_buf, u32 tx_len) { return ssc_session(tx_buf, tx_len, NULL, 0); } EXPORT_SYMBOL(ifx_ssc_tx); -int -ifx_ssc_rx (char *rx_buf, u32 rx_len) +int ifx_ssc_rx(char *rx_buf, u32 rx_len) { return ssc_session(NULL, 0, rx_buf, rx_len); }