[PATCH] m68knommu: ColdFire serial driver fixes

Some updates for the old ColdFire serial driver:

 . support 3 and 4 UARTs on some ColdFire parts that have them
 . enable multifunction pins to serial for 527x CPU's
 . support the 5272 UART's fractional baud rate divisor
 . switch driver name to "mcfserial"

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 51 insertions, 3 deletions

diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
index aee1b31f1a1c..3db206d29b33 100644
--- a/drivers/serial/mcfserial.c
+++ b/drivers/serial/mcfserial.c
@@ -60,7 +60,8 @@ struct timer_list mcfrs_timer_struct;
 #if defined(CONFIG_HW_FEITH)
 #define CONSOLE_BAUD_RATE       38400
 #define DEFAULT_CBAUD           B38400
-#elif defined(CONFIG_MOD5272) || defined(CONFIG_M5208EVB) || defined(CONFIG_M5329EVB)
+#elif defined(CONFIG_MOD5272) || defined(CONFIG_M5208EVB) || \
+      defined(CONFIG_M5329EVB) || defined(CONFIG_GILBARCO)
 #define CONSOLE_BAUD_RATE       115200
 #define DEFAULT_CBAUD           B115200
 #elif defined(CONFIG_ARNEWSH) || defined(CONFIG_FREESCALE) || \
@@ -109,12 +110,30 @@ static struct mcf_serial mcfrs_table[] = {
                 .irq = IRQBASE,
                 .flags = ASYNC_BOOT_AUTOCONF,
         },
+#ifdef MCFUART_BASE2
         {  /* ttyS1 */
                 .magic = 0,
                 .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE2),
                 .irq = IRQBASE+1,
                 .flags = ASYNC_BOOT_AUTOCONF,
         },
+#endif
+#ifdef MCFUART_BASE3
+        {  /* ttyS2 */
+                .magic = 0,
+                .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE3),
+                .irq = IRQBASE+2,
+                .flags = ASYNC_BOOT_AUTOCONF,
+        },
+#endif
+#ifdef MCFUART_BASE4
+        {  /* ttyS3 */
+                .magic = 0,
+                .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE4),
+                .irq = IRQBASE+3,
+                .flags = ASYNC_BOOT_AUTOCONF,
+        },
+#endif
 };
 
 
@@ -1516,6 +1535,22 @@ static void mcfrs_irqinit(struct mcf_serial *info)
         imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 +
                 MCFINTC_IMRL);
         *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1);
+#if defined(CONFIG_M527x)
+        {
+                /*
+                 * External Pin Mask Setting & Enable External Pin for Interface
+                 * mrcbis@aliceposta.it
+                 */
+                unsigned short *serpin_enable_mask;
+                serpin_enable_mask = (MCF_IPSBAR + MCF_GPIO_PAR_UART);
+                if (info->line == 0)
+                        *serpin_enable_mask |= UART0_ENABLE_MASK;
+                else if (info->line == 1)
+                        *serpin_enable_mask |= UART1_ENABLE_MASK;
+                else if (info->line == 2)
+                        *serpin_enable_mask |= UART2_ENABLE_MASK;
+        }
+#endif
 #elif defined(CONFIG_M520x)
         volatile unsigned char *icrp, *uartp;
         volatile unsigned long *imrp;
@@ -1713,7 +1748,7 @@ mcfrs_init(void)
         /* Initialize the tty_driver structure */
         mcfrs_serial_driver->owner = THIS_MODULE;
         mcfrs_serial_driver->name = "ttyS";
-        mcfrs_serial_driver->driver_name = "serial";
+        mcfrs_serial_driver->driver_name = "mcfserial";
         mcfrs_serial_driver->major = TTY_MAJOR;
         mcfrs_serial_driver->minor_start = 64;
         mcfrs_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
@@ -1797,10 +1832,23 @@ void mcfrs_init_console(void)
         uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
         uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
 
+#ifdef  CONFIG_M5272
+{
+        /*
+         * For the MCF5272, also compute the baudrate fraction.
+         */
+        int fraction = MCF_BUSCLK - (clk * 32 * mcfrs_console_baud);
+        fraction *= 16;
+        fraction /= (32 * mcfrs_console_baud);
+        uartp[MCFUART_UFPD] = (fraction & 0xf);         /* set fraction */
+        clk = (MCF_BUSCLK / mcfrs_console_baud) / 32;
+}
+#else
         clk = ((MCF_BUSCLK / mcfrs_console_baud) + 16) / 32; /* set baud */
+#endif
+
         uartp[MCFUART_UBG1] = (clk & 0xff00) >> 8;  /* set msb baud */
         uartp[MCFUART_UBG2] = (clk & 0xff);  /* set lsb baud */
-
         uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
         uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;