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Add support for VersaLink modem control on DCE ports 0 and 3

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SVN-Revision: 7144
This commit is contained in:
Hamish Guthrie 2007-05-09 08:29:08 +00:00
parent 77a291b463
commit 91cdb3476d
1 changed files with 71 additions and 0 deletions
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71
target/linux/at91-2.6/patches/008-fdl-serial.patch Normal file
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@ -0,0 +1,71 @@
--- linux-2.6.19.2.old/drivers/serial/atmel_serial.c 2007-05-01 13:08:03.000000000 +0200
+++ linux-2.6.19.2/drivers/serial/atmel_serial.c 2007-05-09 10:21:45.000000000 +0200
@@ -173,6 +173,34 @@
at91_set_gpio_value(AT91_PIN_PA21, 0);
else
at91_set_gpio_value(AT91_PIN_PA21, 1);
+
+ /*
+ * FDL VersaLink adds GPIOS to provide full modem control on
+ * USART 0 - Drive DTR and RI pins manually
+ */
+ if (mctrl & TIOCM_DTR)
+ at91_set_gpio_value(AT91_PIN_PA19, 0);
+ else
+ at91_set_gpio_value(AT91_PIN_PA19, 1);
+ if (mctrl & TIOCM_RI)
+ at91_set_gpio_value(AT91_PIN_PB7, 0);
+ else
+ at91_set_gpio_value(AT91_PIN_PB7, 1);
+ }
+
+ /*
+ * FDL VersaLink adds GPIOS to provide full modem control on
+ * USART 3 - Drive DTR and RI pins manually
+ */
+ if (port->mapbase == AT91RM9200_BASE_US3) {
+ if (mctrl & TIOCM_DTR)
+ at91_set_gpio_value(AT91_PIN_PA24, 0);
+ else
+ at91_set_gpio_value(AT91_PIN_PA24, 1);
+ if (mctrl & TIOCM_RI)
+ at91_set_gpio_value(AT91_PIN_PB2, 0);
+ else
+ at91_set_gpio_value(AT91_PIN_PB2, 1);
}
}
#endif
@@ -210,8 +238,14 @@
/*
* The control signals are active low.
*/
- if (!(status & ATMEL_US_DCD))
- ret |= TIOCM_CD;
+
+ /*
+ * Ignore DCD reister for USARTS 0 and 3 as FDL Versalink uses
+ * GPIO's for these signals
+ */
+ if (!(port->mapbase == AT91RM9200_BASE_US0 || port->mapbase == AT91RM9200_BASE_US3))
+ if (!(status & ATMEL_US_DCD))
+ ret |= TIOCM_CD;
if (!(status & ATMEL_US_CTS))
ret |= TIOCM_CTS;
if (!(status & ATMEL_US_DSR))
@@ -219,6 +253,16 @@
if (!(status & ATMEL_US_RI))
ret |= TIOCM_RI;
+ /*
+ * Read the GPIO's for the FDL VersaLink special case
+ */
+ if (port->mapbase == AT91RM9200_BASE_US0)
+ if (!(at91_get_gpio_value(AT91_PIN_PB6)))
+ ret |= TIOCM_CD;
+ if (port->mapbase == AT91RM9200_BASE_US3)
+ if (!(at91_get_gpio_value(AT91_PIN_PB29)))
+ ret |= TIOCM_CD;
+
return ret;
}