Subject: mx27: gpio multiplexing support From: Robert Schwebel FIXME: split apart into generic function plus things which are special to ADS. Signed-off-by: Robert Schwebel Signed-off-by: N.N. (FIXME: get a sign from freescale) --- arch/arm/mach-mx27/gpio.c | 146 ++++++++++++++++++++++++++++++++++------------ 1 file changed, 110 insertions(+), 36 deletions(-) Index: arch/arm/mach-mx27/gpio.c =================================================================== --- arch/arm/mach-mx27/gpio.c.orig +++ arch/arm/mach-mx27/gpio.c @@ -1,43 +1,38 @@ /* - * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + * linux/arch/arm/mach-mx27/gpio.c + * + * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2007 Robert Schwebel , Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. */ /* - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html + * TODO + * - are the gpio_* functions generic? may be per arch */ #include #include #include -#include -#include + #include +#include +#include +#include #include "gpio_mux.h" #include "crm_regs.h" static int g_uart_activated[MXC_UART_NR] = { 0, 0, 0, 0, 0, 0 }; -/*! - * @file mach-mx27/gpio.c - * - * @brief This file contains all the GPIO setup functions for the board. - * - * @ingroup GPIO_MX27 - */ - -/*! - * Setup GPIO for a UART port to be active - * - * @param port a UART port - * @param ir_mode indicates if the port is used for SIR +/* + * FIXME: pcm038: we have uart 0, 1, 2 -> ttymxc0..2 */ -void gpio_uart_active(int port, int ir_mode) +void +gpio_uart_active(int port, int ir_mode) { if (port < 0 || port >= MXC_UART_NR) { pr_info("Wrong port number: %d\n", port); @@ -45,9 +40,11 @@ void gpio_uart_active(int port, int ir_m } if (g_uart_activated[port]) { - pr_info("UART %d has been activated multiple times\n", port + 1); + pr_info("UART %d has been activated multiple times\n", + port + 1); return; } + g_uart_activated[port] = 1; switch (port) { @@ -69,14 +66,18 @@ void gpio_uart_active(int port, int ir_m gpio_request_mux(MX27_PIN_UART3_CTS, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_UART3_RTS, GPIO_MUX_PRIMARY); - /* enable or disable the IrDA transceiver based on ir_mode */ -/* FIXME refactor for generic boards */ -#ifdef CONFIG_MACH_MX27ADS - if (ir_mode == IRDA) - __raw_writew(PBC_BCTRL2_IRDA_EN, PBC_BCTRL2_CLEAR_REG); - else - __raw_writew(PBC_BCTRL2_IRDA_EN, PBC_BCTRL2_SET_REG); -#endif + /* + * on mx27ads we have to enable or disable the IrDA + * transceiver based on ir_mode + */ + if (machine_is_mx27ads()) { + if (ir_mode == IRDA) + __raw_writew(PBC_BCTRL2_IRDA_EN, + PBC_BCTRL2_CLEAR_REG); + else + __raw_writew(PBC_BCTRL2_IRDA_EN, + PBC_BCTRL2_SET_REG); + } break; case 3: gpio_request_mux(MX27_PIN_USBH1_TXDM, GPIO_MUX_ALT); @@ -187,6 +188,7 @@ void config_uartdma_event(int port) * PB25 - PB31 -- PRIMARY PB22 -- PRIMARY */ +/* FIXME pcm038: usbh1->non-otg with onboard transceiver; conflicts with spi interface */ void gpio_usbh1_active(void) { gpio_request_mux(MX27_PIN_USBH1_SUSP, GPIO_MUX_PRIMARY); @@ -213,6 +215,10 @@ void gpio_usbh1_inactive(void) /* * conflicts with CSPI1 (MC13783) and CSPI2 (Connector) */ +/* FIXME pcm038: + * usbh2->non-otg with baseboard 1504 transceiver + * checked + */ void gpio_usbh2_active(void) { gpio_set_puen(MX27_PIN_USBH2_CLK, 0); @@ -220,6 +226,7 @@ void gpio_usbh2_active(void) gpio_set_puen(MX27_PIN_USBH2_DATA7, 0); gpio_set_puen(MX27_PIN_USBH2_NXT, 0); gpio_set_puen(MX27_PIN_USBH2_STP, 0); + gpio_set_puen(MX27_PIN_CSPI2_SS2, 0); gpio_set_puen(MX27_PIN_CSPI2_SS1, 0); gpio_set_puen(MX27_PIN_CSPI2_SS0, 0); @@ -272,6 +279,9 @@ void gpio_usbh2_inactive(void) gpio_set_puen(MX27_PIN_CSPI1_SS2, 1); } +/* + * FIXME: pcm038: checked + */ void gpio_usbotg_hs_active(void) { gpio_request_mux(MX27_PIN_USBOTG_DATA5, GPIO_MUX_PRIMARY); @@ -337,6 +347,9 @@ void gpio_usbotg_fs_inactive(void) * * @param i2c_num an I2C device */ +/* + * FIXME: pcm038: checked + */ void gpio_i2c_active(int i2c_num) { switch (i2c_num) { @@ -380,21 +393,24 @@ void gpio_i2c_inactive(int i2c_num) * * @param cspi_mod an CSPI device */ +/* + * FIXME: pcm038: checked + */ void gpio_spi_active(int cspi_mod) { switch (cspi_mod) { case 0: - /* SPI1 */ + /* SPI1 */ /* pcm038: checked */ gpio_request_mux(MX27_PIN_CSPI1_MOSI, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI1_MISO, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI1_SCLK, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI1_RDY, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI1_SS0, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI1_SS1, GPIO_MUX_PRIMARY); - gpio_request_mux(MX27_PIN_CSPI1_SS2, GPIO_MUX_PRIMARY); + gpio_request_mux(MX27_PIN_CSPI1_SS2, GPIO_MUX_PRIMARY); /* pcm038: we don't have this one */ break; case 1: - /*SPI2 */ + /* SPI2 */ /* FIXME pcm038: not used on pcm038 */ gpio_request_mux(MX27_PIN_CSPI2_MOSI, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI2_MISO, GPIO_MUX_PRIMARY); gpio_request_mux(MX27_PIN_CSPI2_SCLK, GPIO_MUX_PRIMARY); @@ -403,7 +419,7 @@ void gpio_spi_active(int cspi_mod) gpio_request_mux(MX27_PIN_CSPI2_SS2, GPIO_MUX_PRIMARY); break; case 2: - /*SPI3 */ + /* SPI3 */ /* pcm038: checked */ gpio_request_mux(MX27_PIN_SD1_D0, GPIO_MUX_ALT); gpio_request_mux(MX27_PIN_SD1_CMD, GPIO_MUX_ALT); gpio_request_mux(MX27_PIN_SD1_CLK, GPIO_MUX_ALT); @@ -459,6 +475,9 @@ void gpio_spi_inactive(int cspi_mod) * Setup GPIO for a nand flash device to be active * */ +/* + * FIXME: pcm038: checked + */ void gpio_nand_active(void) { unsigned long reg; @@ -494,6 +513,9 @@ void gpio_nand_inactive(void) * Setup GPIO for CSI device to be active * */ +/* + * FIXME: pcm038: checked + */ void gpio_sensor_active(void) { gpio_request_mux(MX27_PIN_CSI_D0, GPIO_MUX_PRIMARY); @@ -561,6 +583,9 @@ void gpio_sensor_reset(bool flag) * Setup GPIO for LCDC device to be active * */ +/* + * FIXME: pcm038: checked + */ void gpio_lcdc_active(void) { gpio_request_mux(MX27_PIN_LSCLK, GPIO_MUX_PRIMARY); @@ -631,6 +656,9 @@ void gpio_lcdc_inactive(void) * Setup GPIO PA25 low to start hard reset FS453 TV encoder * */ +/* + * FIXME: pcm038: we don't have this one, put into ads code + */ void gpio_fs453_reset_low(void) { gpio_free_mux(MX27_PIN_CLS); @@ -667,16 +695,32 @@ void gpio_fs453_reset_high(void) * This function configures the IOMux block for PMIC standard operations. * */ +/* + * FIXME: pcm038: re-check with ads schematic + */ void gpio_pmic_active(void) { + /* FIXME This is board specific! Not generic! */ +#if 1 +/* This is for pcm038 */ + gpio_config_mux(MX27_PIN_USB_PWR, GPIO_MUX_GPIO); + mxc_set_gpio_direction(MX27_PIN_USB_PWR, 1); +#endif +#if 0 +/* This is for ADS */ gpio_config_mux(MX27_PIN_TOUT, GPIO_MUX_GPIO); mxc_set_gpio_direction(MX27_PIN_TOUT, 1); +#endif } /*! * GPIO settings not required for keypad * */ +/* + * FIXME: pcm038: we have to do something here when a keypad is connected + * KP_COL...KP_ROW, don't have an alternate function, so maybe nothing to do here + */ void gpio_keypad_active(void) { } @@ -693,6 +737,9 @@ void gpio_keypad_inactive(void) * Setup GPIO for ATA device to be active * */ +/* + * FIXME: pcm038: we don't have ata + */ void gpio_ata_active(void) { gpio_request_mux(MX27_PIN_ATA_DATA0, GPIO_MUX_PRIMARY); @@ -769,6 +816,9 @@ void gpio_ata_inactive(void) * Setup GPIO for FEC device to be active * */ +/* + * FIXME: pcm038: checked + */ void gpio_fec_active(void) { gpio_request_mux(MX27_PIN_ATA_DATA15, GPIO_MUX_OUTPUT1); @@ -846,6 +896,9 @@ void gpio_fec_inactive(void) * Setup GPIO for SLCDC device to be active * */ +/* + * FIXME: pcm038: "smart lcd controller" not used + */ void gpio_slcdc_active(int type) { switch (type) { @@ -936,6 +989,13 @@ void gpio_slcdc_inactive(int type) return; } +/* + * FIXME: pcm038: + * - SSI1 used + * - SSI2 not used, gpio + * - SSI3 not used, gpio + * - SSI4 -> PMIC + */ void gpio_ssi_active(int ssi_num) { switch (ssi_num) { @@ -997,6 +1057,9 @@ void gpio_ssi_inactive(int ssi_num) * * @param module SDHC module number */ +/* + * FIXME: pcm038: we have SD2 + */ void gpio_sdhc_active(int module) { u16 data; @@ -1096,6 +1159,9 @@ int sdhc_get_card_det_status(struct devi /* * Return the card detect pin. */ +/* + * FIXME: pcm038: we need this information + */ int sdhc_init_card_det(int id) { int ret = 0; @@ -1116,6 +1182,9 @@ int sdhc_init_card_det(int id) /* * Power on/off Sharp QVGA panel. */ +/* + * FIXME: pcm038: currently not used, but will be in the next board revision + */ void board_power_lcd(int on) { /* FIXME refactor for generic boards */ @@ -1127,6 +1196,9 @@ void board_power_lcd(int on) #endif } +/* + * FIXME: pcm038: checked + */ void gpio_owire_active(void) { gpio_request_mux(MX27_PIN_RTCK, GPIO_MUX_ALT); @@ -1137,6 +1209,9 @@ void gpio_owire_inactive(void) gpio_request_mux(MX27_PIN_RTCK, GPIO_MUX_PRIMARY); } +/* + * FIXME: pcm038: we don't have irda + */ void gpio_irda_active(void) { gpio_uart_active(2, 0); @@ -1149,6 +1224,14 @@ void gpio_irda_inactive(void) gpio_uart_inactive(2, 0); } +/* + * FIXME: pcm038: missing functions: + * - T_IN T_OUT (Timer In/Out) + * - PCMCIA + * - PWM output + * - PE19, PE20, PC28-31, GPT4_TIN/TOUT, GPT5_TIN/TOUT, PB23-24 -> gpio + */ + EXPORT_SYMBOL(gpio_uart_active); EXPORT_SYMBOL(gpio_uart_inactive); EXPORT_SYMBOL(config_uartdma_event);