2dab6a5384
The padconf library runs in user mode, but to actually affect the padconf register contents, the processor has to be in privileged mode. A full server based solution will be developed, but for now just set the pinmux in the kernel at boot. Change-Id: I170ed54dae64b27cd9bd8807445231598fb8e3e1
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/* temporary padconf work-around
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*
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* pinmux must be configured in privileged mode on the Cortex-A8. This code
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* does a simple static configuration of a few pins. It's only here until
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* a proper padconf server that does kernel calls can be developed.
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*/
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#include "kernel/kernel.h"
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#include <sys/types.h>
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#include <machine/cpu.h>
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#include <minix/mmio.h>
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#include <assert.h>
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#include <io.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "omap_padconf.h"
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u32_t base = PADCONF_REGISTERS_BASE;
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static int kernel_padconf_set(u32_t padconf, u32_t mask, u32_t value);
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static int
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kernel_padconf_set(u32_t padconf, u32_t mask, u32_t value)
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{
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assert(padconf <= CONTROL_CONF_USB1_DRVVBUS);
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set32(base + padconf, mask, value);
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return OK;
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}
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void
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omap3_padconf_init(void)
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{
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#ifdef AM335X
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u32_t pinopts, value;
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/* Common options for BeagleBone I2C Pins */
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pinopts = CONTROL_CONF_SLEWCTRL | CONTROL_CONF_RXACTIVE |
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CONTROL_CONF_PUTYPESEL;
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/* I2C0 */
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value = pinopts | CONTROL_CONF_MUXMODE(0);
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kernel_padconf_set(CONTROL_CONF_I2C0_SDA, 0xffffffff, value);
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kernel_padconf_set(CONTROL_CONF_I2C0_SCL, 0xffffffff, value);
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/* I2C1 */
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value = pinopts | CONTROL_CONF_MUXMODE(2);
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kernel_padconf_set(CONTROL_CONF_SPI0_CS0, 0xffffffff, value);
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kernel_padconf_set(CONTROL_CONF_SPI0_D1, 0xffffffff, value);
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/* I2C2 */
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value = pinopts | CONTROL_CONF_MUXMODE(3);
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kernel_padconf_set(CONTROL_CONF_UART1_CTSN, 0xffffffff, value);
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kernel_padconf_set(CONTROL_CONF_UART1_RTSN, 0xffffffff, value);
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#endif
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/* nothing to do for DM37XX */
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return;
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}
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