On Thu, 22 Jun 2006 09:26:49 -0400 Straub, Michael wrote:
> Adds Equinox multi-port serial (SST) driver.
>
> Part 13: new source file: drivers/char/eqnx/sst_misc.c. Provides
> general
> support routines used throughout the driver source.
>
> Signed-off-by: Mike Straub <[email protected]>
>
> ---
> sst_misc.c | 758
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 758 insertions(+)
diff -Naurp -X dontdiff linux-2.6.17/drivers/char/eqnx/sst_misc.c linux-2.6.17.eqnx/drivers/char/eqnx/sst_misc.c
--- linux-2.6.17/drivers/char/eqnx/sst_misc.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.17.eqnx/drivers/char/eqnx/sst_misc.c 2006-06-20 09:50:17.000000000 -0400
@@ -0,0 +1,758 @@
+/*
+/*
+#include <linux/config.h>
Drop config.h.
+#include <linux/version.h>
+
+#ifdef CONFIG_MODVERSIONS
+#define MODVERSIONS 1
+#endif
not used.
+/***************************************************************************/
+
+/* external variable and routines
+
+extern struct mpchan *eqnx_chan;
+extern int SSTMINOR(unsigned int, unsigned int);
Put these in a header file.
+int eqnx_modem(int d, int cmd)
+{
+ struct mpchan *mpc = &eqnx_chan[d];
+ volatile struct icp_in_struct *icpi = mpc->mpc_icpi;
+ volatile struct cin_bnk_struct *icpb;
+ u16 cur, mux;
+
+ switch (cmd) {
+ case TURNON:
+ if ((mpc->mpc_tty) && (mpc->mpc_tty->termios)) {
+ if (mpc->mpc_tty->termios->c_cflag & CRTSCTS)
+ cur &= ~TX_HFC_RTS;
+ }
Don't really need those braces.
+}
+
+static void inline megaparam_speed(struct mpchan *mpc,
+ volatile struct termios *tiosp)
+{
+ volatile struct icp_in_struct *icpi;
+ volatile struct icp_out_struct *icpo;
+ volatile struct cout_que_struct *icpq;
+ u32 speed;
+ u16 d;
+ struct mpdev *mpd = mpc->mpc_mpd;
+
+ icpi = mpc->mpc_icpi;
+ icpo = mpc->mpc_icpo;
+
+ if ((speed >= 0) && (speed <= (B38400 + 4))) {
speed is always >= 0 since it is a u32.
+ d = megaparam_icpbaud(mpc, speed);
+ if (d != SSTRD16(icpi->cin_baud))
+ SSTWR16(icpi->cin_baud, d);
...
+}
+
+static void inline megaparam_databits(struct mpchan *mpc,
+ volatile struct termios *tiosp)
+{
+ default:
+ /* CS8 */
Don't use obvious comments like that one.
+ d = CS_8;
+ if (tiosp->c_iflag & ISTRIP)
+ e |= EN_ISTRIP;
+ }
...
+}
+
+static void inline megaparam_parity(struct mpchan *mpc,
+ volatile struct termios *tiosp)
+{
+ volatile struct icp_in_struct *icpi;
+ volatile struct icp_out_struct *icpo;
+ unsigned char oldreg;
+ int ii;
+ u16 d = 0, e, char_cntrl, attn_ena;
+ struct mpdev *mpd = mpc->mpc_mpd;
+
+ icpi = mpc->mpc_icpi;
+ icpo = mpc->mpc_icpo;
+
+ /* clear lookup table */
+ for (ii = 0; ii < 32; ii++)
+ icpi->cin_lookup_tbl[ii] = 0;
Can you use
memset(icpi->cin_lookup_tbl, 0, sizeof(icpi->cin_lookup_tbl));
instead of the for-loop?
...
+}
+
+static void megajam(struct mpchan *mpc)
+{
+ volatile struct icp_out_struct *icpo = mpc->mpc_icpo;
+ int ii = 0;
+
+ while (((icpo->cout_flow_config & TX_TGL_XON_XOFF) !=
+ (icpo->cout_intnl_flow_ctrl & IFLOW_TOGGLE)) &&
+ (++ii < 100000)) ;
+
+ ii = 0;
+ while ((icpo->cout_intnl_flow_ctrl & IFLOW_XOFF) && (++ii < 100000)) ;
Use something other than counter loops here?
+}
+
+void eqnx_chnl_sync(struct mpchan *mpc)
+{
+ volatile union global_regs_u *icpg;
+ int i = 0;
+ volatile unsigned char *chan_ptr;
+ struct icp_struct *icp;
+
+ if (mpc->mpc_mpd->mpd_board_def->asic == SSP64) {
+ /* SSP64 */
unneeded comment
+ icpg = (volatile union global_regs_u *)mpc->mpc_icpo;
+ chan_ptr = &(icpg->ssp.gicp_chan);
+ } else {
+ /* SSP4 */
+ icp = mpc->mpc_icp;
+ icpg = (volatile union global_regs_u *)
+ ((unsigned long)icp->icp_regs_start + 0x400);
+ chan_ptr = &(icpg->ssp4.chan_ctr);
+ }
+
+ while (*chan_ptr == mpc->mpc_chan) {
+ if (++i > 9000)
counter "timeout"?
+ break;
+ }
+}
+
+void eqnx_frame_wait(struct mpchan *mpc, int count)
+{
+ volatile union global_regs_u *icpg;
+ volatile struct icp_out_struct *icpo;
+ u16 final, original;
+ volatile u16 *frame_ptr, curval;
+ int x, wrap;
+
+ if (mpc->mpc_mpd->mpd_board_def->asic == SSP64) {
+ /* SSP64 */
drop that comment.
+ icpg = (volatile union global_regs_u *)(mpc->mpc_icpo);
+ frame_ptr = &icpg->ssp.gicp_frame_ctr;
+ } else {
+ /* SSP4 */
+ icpg = (volatile union global_regs_u *)
+ ((unsigned long)(mpc->mpc_icpi) + 0x400);
+ icpo = (volatile struct icp_out_struct *)
+ ((unsigned long)(mpc->mpc_icp->icp_regs_start) + 0x200);
+ frame_ptr = &(icpo->cout_frame_ctr);
+ }
+
+ original = SSTRD16(*frame_ptr);
+ final = original + count;
+ wrap = (final > original) ? false : true;
+ for (x = 0; x < 0x100000; x++) {
+ curval = SSTRD16(*frame_ptr);
+ if (curval > final) {
+ if (!wrap)
+ break;
+ if (curval < original)
+ break;
+ }
+ }
+
+ if (x > 0x100000)
+ dev_warn(mpc->mpc_mpd->dev, "eqnx_frame_wait: timeout\n");
counter "timeout"?
+}
---
~Randy
-
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