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ARMV7: OMAP: Overo: Autodetect presence/absence of transceiver on mmc2

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An upcoming version of Overo uses a Wifi/BT module with 1.8V signaling,
eliminating the need for an external transceiver to handle the level
shifting.  This patch detects whether an external transceiver is present
and adjusts the pinmux settings as appropriate.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
master
Steve Sakoman 14 years ago committed by Sandeep Paulraj
parent 08cbba2abf
commit a06e1629f4
2 changed files with 80 additions and 2 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 47
      board/overo/overo.c
  2. 35
      board/overo/overo.h

47
board/overo/overo.c
Unescape View File

@ -103,6 +103,39 @@ int get_board_revision(void)
}
/*
* Routine: get_sdio2_config
* Description: Return information about the wifi module connection
* Returns 0 if the module connects though a level translator
* Returns 1 if the module connects directly
*/
int get_sdio2_config(void)
{
int sdio_direct;
if (!omap_request_gpio(130) && !omap_request_gpio(139)) {
omap_set_gpio_direction(130, 0);
omap_set_gpio_direction(139, 1);
sdio_direct = 1;
omap_set_gpio_dataout(130, 0);
if (omap_get_gpio_datain(139) == 0) {
omap_set_gpio_dataout(130, 1);
if (omap_get_gpio_datain(139) == 1)
sdio_direct = 0;
}
omap_free_gpio(130);
omap_free_gpio(139);
} else {
printf("Error: unable to acquire sdio2 clk GPIOs\n");
sdio_direct = -1;
}
return sdio_direct;
}
/*
* Routine: misc_init_r
* Description: Configure board specific parts
*/
@ -116,6 +149,20 @@ int misc_init_r(void)
#endif
printf("Board revision: %d\n", get_board_revision());
switch (get_sdio2_config()) {
case 0:
printf("Tranceiver detected on mmc2\n");
MUX_OVERO_SDIO2_TRANSCEIVER();
break;
case 1:
printf("Direct connection on mmc2\n");
MUX_OVERO_SDIO2_DIRECT();
break;
default:
printf("Unable to detect mmc2 connection type\n");
}
dieid_num_r();
return 0;

35
board/overo/overo.h
Unescape View File

@ -211,7 +211,7 @@ const omap3_sysinfo sysinfo = {
MUX_VAL(CP(MMC1_DAT6), (IEN | PTU | EN | M0)) /*MMC1_DAT6*/\
MUX_VAL(CP(MMC1_DAT7), (IEN | PTU | EN | M0)) /*MMC1_DAT7*/\
/*Wireless LAN */\
MUX_VAL(CP(MMC2_CLK), (IEN | PTU | EN | M0)) /*MMC2_CLK*/\
MUX_VAL(CP(MMC2_CLK), (IEN | PTU | EN | M4)) /*GPIO_130*/\
MUX_VAL(CP(MMC2_CMD), (IEN | PTU | EN | M0)) /*MMC2_CMD*/\
MUX_VAL(CP(MMC2_DAT0), (IEN | PTU | EN | M0)) /*MMC2_DAT0*/\
MUX_VAL(CP(MMC2_DAT1), (IEN | PTU | EN | M0)) /*MMC2_DAT1*/\
@ -220,7 +220,7 @@ const omap3_sysinfo sysinfo = {
MUX_VAL(CP(MMC2_DAT4), (IEN | PTU | EN | M1)) /*MMC2_DIR_DAT0*/\
MUX_VAL(CP(MMC2_DAT5), (IEN | PTU | EN | M1)) /*MMC2_DIR_DAT1*/\
MUX_VAL(CP(MMC2_DAT6), (IEN | PTU | EN | M1)) /*MMC2_DIR_CMD*/\
MUX_VAL(CP(MMC2_DAT7), (IEN | PTU | EN | M1)) /*MMC2_CLKIN*/\
MUX_VAL(CP(MMC2_DAT7), (IEN | PTU | EN | M4)) /*GPIO_139*/\
/*Bluetooth*/\
MUX_VAL(CP(MCBSP3_DX), (IEN | PTD | DIS | M1)) /*UART2_CTS*/\
MUX_VAL(CP(MCBSP3_DR), (IDIS | PTD | DIS | M1)) /*UART2_RTS*/\
@ -387,5 +387,36 @@ const omap3_sysinfo sysinfo = {
MUX_VAL(CP(SDRC_CKE0), (IDIS | PTU | EN | M0)) /*sdrc_cke0*/\
MUX_VAL(CP(SDRC_CKE1), (IDIS | PTU | EN | M0)) /*sdrc_cke1*/
#define MUX_OVERO_SDIO2_DIRECT() \
MUX_VAL(CP(MMC2_CLK), (IEN | PTU | EN | M0)) /*MMC2_CLK*/\
MUX_VAL(CP(MMC2_CMD), (IEN | PTU | EN | M0)) /*MMC2_CMD*/\
MUX_VAL(CP(MMC2_DAT0), (IEN | PTU | EN | M0)) /*MMC2_DAT0*/\
MUX_VAL(CP(MMC2_DAT1), (IEN | PTU | EN | M0)) /*MMC2_DAT1*/\
MUX_VAL(CP(MMC2_DAT2), (IEN | PTU | EN | M0)) /*MMC2_DAT2*/\
MUX_VAL(CP(MMC2_DAT3), (IEN | PTU | EN | M0)) /*MMC2_DAT3*/\
MUX_VAL(CP(MMC2_DAT4), (IEN | PTU | EN | M0)) /*MMC2_DAT4*/\
MUX_VAL(CP(MMC2_DAT5), (IEN | PTU | EN | M0)) /*MMC2_DAT5*/\
MUX_VAL(CP(MMC2_DAT6), (IEN | PTU | EN | M0)) /*MMC2_DAT6*/\
MUX_VAL(CP(MMC2_DAT7), (IEN | PTU | EN | M0)) /*MMC2_DAT7*/\
MUX_VAL(CP(MMC1_DAT4), (IEN | PTD | EN | M4)) /*GPIO_126*/\
MUX_VAL(CP(MMC1_DAT5), (IEN | PTU | EN | M4)) /*GPIO_127*/\
MUX_VAL(CP(MMC1_DAT6), (IEN | PTU | EN | M4)) /*GPIO_128*/\
MUX_VAL(CP(MMC1_DAT7), (IEN | PTU | EN | M4)) /*GPIO_129*/
#define MUX_OVERO_SDIO2_TRANSCEIVER() \
MUX_VAL(CP(MMC2_CLK), (IEN | PTU | EN | M0)) /*MMC2_CLK*/\
MUX_VAL(CP(MMC2_CMD), (IEN | PTU | EN | M0)) /*MMC2_CMD*/\
MUX_VAL(CP(MMC2_DAT0), (IEN | PTU | EN | M0)) /*MMC2_DAT0*/\
MUX_VAL(CP(MMC2_DAT1), (IEN | PTU | EN | M0)) /*MMC2_DAT1*/\
MUX_VAL(CP(MMC2_DAT2), (IEN | PTU | EN | M0)) /*MMC2_DAT2*/\
MUX_VAL(CP(MMC2_DAT3), (IEN | PTU | EN | M0)) /*MMC2_DAT3*/\
MUX_VAL(CP(MMC2_DAT4), (IEN | PTU | EN | M1)) /*MMC2_DIR_DAT0*/\
MUX_VAL(CP(MMC2_DAT5), (IEN | PTU | EN | M1)) /*MMC2_DIR_DAT1*/\
MUX_VAL(CP(MMC2_DAT6), (IEN | PTU | EN | M1)) /*MMC2_DIR_CMD*/\
MUX_VAL(CP(MMC2_DAT7), (IEN | PTU | EN | M1)) /*MMC2_CLKIN*/\
MUX_VAL(CP(MMC1_DAT4), (IEN | PTU | EN | M4)) /*GPIO_126*/\
MUX_VAL(CP(MMC1_DAT5), (IEN | PTU | EN | M4)) /*GPIO_127*/\
MUX_VAL(CP(MMC1_DAT6), (IEN | PTU | EN | M4)) /*GPIO_128*/\
MUX_VAL(CP(MMC1_DAT7), (IEN | PTU | EN | M4)) /*GPIO_129*/
#endif

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