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linux/arch/arm/mach-omap2/board-am3517evm.c
Varadarajan, Charulatha 77640aabd7 OMAP: GPIO: Implement GPIO as a platform device 
Implement GPIO as a platform device.

GPIO APIs are used in machine_init functions. Hence it is
required to complete GPIO probe before board_init. Therefore
GPIO device register and driver register are implemented as
postcore_initcalls.

omap_gpio_init() does nothing now and this function would be
removed in the next patch as it's usage is spread across most
of the board files.

Inorder to convert GPIO as platform device, modifications are
required in clockxxxx_data.c file for OMAP1 so that device names
can be used to obtain clock instead of getting clocks by
name/NULL ptr.

Use runtime pm APIs (pm_runtime_put*/pm_runtime_get*) for enabling
or disabling the clocks, modify sysconfig settings and remove usage
of clock FW APIs.
Note 1: Converting GPIO driver to use runtime PM APIs is not done as a
separate patch because GPIO clock names are different for various OMAPs
and are different for some of the banks in the same CPU. This would need
usage of cpu_is checks and bank id checks while using clock FW APIs in
the gpio driver. Hence while making GPIO a platform driver framework,
PM runtime APIs are used directly.

Note 2: While implementing GPIO as a platform device, pm runtime APIs
are used as mentioned above and modification is not done in gpio's
prepare for idle/ resume after idle functions. This would be done
in the next patch series and GPIO driver would be made to use dev_pm_ops
instead of sysdev_class in that series only.

Due to the above, the GPIO driver implicitly relies on
CM_AUTOIDLE = 1 on its iclk for power management to work, since the
driver never disables its iclk.
This would be taken care in the next patch series (see Note 3 below).

Refer to
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg39112.html
for more details.

Note 3: only pm_runtime_get_sync is called in gpio's probe() and
pm_runtime_put* is never called. This is to make the implementation
similar to the existing GPIO code. Another patch series would be sent
to correct this.

In OMAP3 and OMAP4 gpio's debounce clocks are optional clocks. They
are enabled/ disabled whenever required using clock framework APIs

TODO:
1. Cleanup the GPIO driver. Use function pointers and register
offest pointers instead of using hardcoded values
2. Remove all cpu_is_ checks and OMAP specific macros
3. Remove usage of gpio_bank array so that only
   instance specific information is used in driver code
4. Rename 'method'/ avoid it's usage
5. Fix the non-wakeup gpios handling for OMAP2430, OMAP3 & OMAP4
6. Modify gpio's prepare for idle/ resume after idle functions
   to use runtime pm implentation.

Signed-off-by: Charulatha V <charu@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Reviewed-by: Basak, Partha <p-basak2@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
[tony@atomide.com: updated for bank specific revision and updated boards]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-07 16:26:57 -08:00

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/*
* linux/arch/arm/mach-omap2/board-am3517evm.c
*
* Copyright (C) 2009 Texas Instruments Incorporated
* Author: Ranjith Lohithakshan <ranjithl@ti.com>
*
* Based on mach-omap2/board-omap3evm.c
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/i2c/pca953x.h>
#include <linux/can/platform/ti_hecc.h>
#include <linux/davinci_emac.h>
#include <mach/hardware.h>
#include <mach/am35xx.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <plat/board.h>
#include <plat/common.h>
#include <plat/usb.h>
#include <plat/display.h>
#include "mux.h"
#include "control.h"
#define AM35XX_EVM_MDIO_FREQUENCY (1000000)
static struct mdio_platform_data am3517_evm_mdio_pdata = {
.bus_freq = AM35XX_EVM_MDIO_FREQUENCY,
};
static struct resource am3517_mdio_resources[] = {
{
.start = AM35XX_IPSS_EMAC_BASE + AM35XX_EMAC_MDIO_OFFSET,
.end = AM35XX_IPSS_EMAC_BASE + AM35XX_EMAC_MDIO_OFFSET +
SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device am3517_mdio_device = {
.name = "davinci_mdio",
.id = 0,
.num_resources = ARRAY_SIZE(am3517_mdio_resources),
.resource = am3517_mdio_resources,
.dev.platform_data = &am3517_evm_mdio_pdata,
};
static struct emac_platform_data am3517_evm_emac_pdata = {
.rmii_en = 1,
};
static struct resource am3517_emac_resources[] = {
{
.start = AM35XX_IPSS_EMAC_BASE,
.end = AM35XX_IPSS_EMAC_BASE + 0x2FFFF,
.flags = IORESOURCE_MEM,
},
{
.start = INT_35XX_EMAC_C0_RXTHRESH_IRQ,
.end = INT_35XX_EMAC_C0_RXTHRESH_IRQ,
.flags = IORESOURCE_IRQ,
},
{
.start = INT_35XX_EMAC_C0_RX_PULSE_IRQ,
.end = INT_35XX_EMAC_C0_RX_PULSE_IRQ,
.flags = IORESOURCE_IRQ,
},
{
.start = INT_35XX_EMAC_C0_TX_PULSE_IRQ,
.end = INT_35XX_EMAC_C0_TX_PULSE_IRQ,
.flags = IORESOURCE_IRQ,
},
{
.start = INT_35XX_EMAC_C0_MISC_PULSE_IRQ,
.end = INT_35XX_EMAC_C0_MISC_PULSE_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device am3517_emac_device = {
.name = "davinci_emac",
.id = -1,
.num_resources = ARRAY_SIZE(am3517_emac_resources),
.resource = am3517_emac_resources,
};
static void am3517_enable_ethernet_int(void)
{
u32 regval;
regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
regval = (regval | AM35XX_CPGMAC_C0_RX_PULSE_CLR |
AM35XX_CPGMAC_C0_TX_PULSE_CLR |
AM35XX_CPGMAC_C0_MISC_PULSE_CLR |
AM35XX_CPGMAC_C0_RX_THRESH_CLR);
omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
}
static void am3517_disable_ethernet_int(void)
{
u32 regval;
regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
regval = (regval | AM35XX_CPGMAC_C0_RX_PULSE_CLR |
AM35XX_CPGMAC_C0_TX_PULSE_CLR);
omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
}
static void am3517_evm_ethernet_init(struct emac_platform_data *pdata)
{
unsigned int regval;
pdata->ctrl_reg_offset = AM35XX_EMAC_CNTRL_OFFSET;
pdata->ctrl_mod_reg_offset = AM35XX_EMAC_CNTRL_MOD_OFFSET;
pdata->ctrl_ram_offset = AM35XX_EMAC_CNTRL_RAM_OFFSET;
pdata->ctrl_ram_size = AM35XX_EMAC_CNTRL_RAM_SIZE;
pdata->version = EMAC_VERSION_2;
pdata->hw_ram_addr = AM35XX_EMAC_HW_RAM_ADDR;
pdata->interrupt_enable = am3517_enable_ethernet_int;
pdata->interrupt_disable = am3517_disable_ethernet_int;
am3517_emac_device.dev.platform_data = pdata;
platform_device_register(&am3517_emac_device);
platform_device_register(&am3517_mdio_device);
clk_add_alias(NULL, dev_name(&am3517_mdio_device.dev),
NULL, &am3517_emac_device.dev);
regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
regval = regval & (~(AM35XX_CPGMACSS_SW_RST));
omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET);
regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
return ;
}
#define LCD_PANEL_PWR 176
#define LCD_PANEL_BKLIGHT_PWR 182
#define LCD_PANEL_PWM 181
static struct i2c_board_info __initdata am3517evm_i2c1_boardinfo[] = {
{
I2C_BOARD_INFO("s35390a", 0x30),
},
};
/*
* RTC - S35390A
*/
#define GPIO_RTCS35390A_IRQ 55
static void __init am3517_evm_rtc_init(void)
{
int r;
omap_mux_init_gpio(GPIO_RTCS35390A_IRQ, OMAP_PIN_INPUT_PULLUP);
r = gpio_request(GPIO_RTCS35390A_IRQ, "rtcs35390a-irq");
if (r < 0) {
printk(KERN_WARNING "failed to request GPIO#%d\n",
GPIO_RTCS35390A_IRQ);
return;
}
r = gpio_direction_input(GPIO_RTCS35390A_IRQ);
if (r < 0) {
printk(KERN_WARNING "GPIO#%d cannot be configured as input\n",
GPIO_RTCS35390A_IRQ);
gpio_free(GPIO_RTCS35390A_IRQ);
return;
}
am3517evm_i2c1_boardinfo[0].irq = gpio_to_irq(GPIO_RTCS35390A_IRQ);
}
/*
* I2C GPIO Expander - TCA6416
*/
/* Mounted on Base-Board */
static struct pca953x_platform_data am3517evm_gpio_expander_info_0 = {
.gpio_base = OMAP_MAX_GPIO_LINES,
};
static struct i2c_board_info __initdata am3517evm_i2c2_boardinfo[] = {
{
I2C_BOARD_INFO("tca6416", 0x21),
.platform_data = &am3517evm_gpio_expander_info_0,
},
};
/* Mounted on UI Card */
static struct pca953x_platform_data am3517evm_ui_gpio_expander_info_1 = {
.gpio_base = OMAP_MAX_GPIO_LINES + 16,
};
static struct pca953x_platform_data am3517evm_ui_gpio_expander_info_2 = {
.gpio_base = OMAP_MAX_GPIO_LINES + 32,
};
static struct i2c_board_info __initdata am3517evm_i2c3_boardinfo[] = {
{
I2C_BOARD_INFO("tca6416", 0x20),
.platform_data = &am3517evm_ui_gpio_expander_info_1,
},
{
I2C_BOARD_INFO("tca6416", 0x21),
.platform_data = &am3517evm_ui_gpio_expander_info_2,
},
};
static int __init am3517_evm_i2c_init(void)
{
omap_register_i2c_bus(1, 400, NULL, 0);
omap_register_i2c_bus(2, 400, am3517evm_i2c2_boardinfo,
ARRAY_SIZE(am3517evm_i2c2_boardinfo));
omap_register_i2c_bus(3, 400, am3517evm_i2c3_boardinfo,
ARRAY_SIZE(am3517evm_i2c3_boardinfo));
return 0;
}
static int lcd_enabled;
static int dvi_enabled;
#if defined(CONFIG_PANEL_SHARP_LQ043T1DG01) || \
defined(CONFIG_PANEL_SHARP_LQ043T1DG01_MODULE)
static void __init am3517_evm_display_init(void)
{
int r;
omap_mux_init_gpio(LCD_PANEL_PWR, OMAP_PIN_INPUT_PULLUP);
omap_mux_init_gpio(LCD_PANEL_BKLIGHT_PWR, OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_gpio(LCD_PANEL_PWM, OMAP_PIN_INPUT_PULLDOWN);
/*
* Enable GPIO 182 = LCD Backlight Power
*/
r = gpio_request(LCD_PANEL_BKLIGHT_PWR, "lcd_backlight_pwr");
if (r) {
printk(KERN_ERR "failed to get lcd_backlight_pwr\n");
return;
}
gpio_direction_output(LCD_PANEL_BKLIGHT_PWR, 1);
/*
* Enable GPIO 181 = LCD Panel PWM
*/
r = gpio_request(LCD_PANEL_PWM, "lcd_pwm");
if (r) {
printk(KERN_ERR "failed to get lcd_pwm\n");
goto err_1;
}
gpio_direction_output(LCD_PANEL_PWM, 1);
/*
* Enable GPIO 176 = LCD Panel Power enable pin
*/
r = gpio_request(LCD_PANEL_PWR, "lcd_panel_pwr");
if (r) {
printk(KERN_ERR "failed to get lcd_panel_pwr\n");
goto err_2;
}
gpio_direction_output(LCD_PANEL_PWR, 1);
printk(KERN_INFO "Display initialized successfully\n");
return;
err_2:
gpio_free(LCD_PANEL_PWM);
err_1:
gpio_free(LCD_PANEL_BKLIGHT_PWR);
}
#else
static void __init am3517_evm_display_init(void) {}
#endif
static int am3517_evm_panel_enable_lcd(struct omap_dss_device *dssdev)
{
if (dvi_enabled) {
printk(KERN_ERR "cannot enable LCD, DVI is enabled\n");
return -EINVAL;
}
gpio_set_value(LCD_PANEL_PWR, 1);
lcd_enabled = 1;
return 0;
}
static void am3517_evm_panel_disable_lcd(struct omap_dss_device *dssdev)
{
gpio_set_value(LCD_PANEL_PWR, 0);
lcd_enabled = 0;
}
static struct omap_dss_device am3517_evm_lcd_device = {
.type = OMAP_DISPLAY_TYPE_DPI,
.name = "lcd",
.driver_name = "sharp_lq_panel",
.phy.dpi.data_lines = 16,
.platform_enable = am3517_evm_panel_enable_lcd,
.platform_disable = am3517_evm_panel_disable_lcd,
};
static int am3517_evm_panel_enable_tv(struct omap_dss_device *dssdev)
{
return 0;
}
static void am3517_evm_panel_disable_tv(struct omap_dss_device *dssdev)
{
}
static struct omap_dss_device am3517_evm_tv_device = {
.type = OMAP_DISPLAY_TYPE_VENC,
.name = "tv",
.driver_name = "venc",
.phy.venc.type = OMAP_DSS_VENC_TYPE_SVIDEO,
.platform_enable = am3517_evm_panel_enable_tv,
.platform_disable = am3517_evm_panel_disable_tv,
};
static int am3517_evm_panel_enable_dvi(struct omap_dss_device *dssdev)
{
if (lcd_enabled) {
printk(KERN_ERR "cannot enable DVI, LCD is enabled\n");
return -EINVAL;
}
dvi_enabled = 1;
return 0;
}
static void am3517_evm_panel_disable_dvi(struct omap_dss_device *dssdev)
{
dvi_enabled = 0;
}
static struct omap_dss_device am3517_evm_dvi_device = {
.type = OMAP_DISPLAY_TYPE_DPI,
.name = "dvi",
.driver_name = "generic_panel",
.phy.dpi.data_lines = 24,
.platform_enable = am3517_evm_panel_enable_dvi,
.platform_disable = am3517_evm_panel_disable_dvi,
};
static struct omap_dss_device *am3517_evm_dss_devices[] = {
&am3517_evm_lcd_device,
&am3517_evm_tv_device,
&am3517_evm_dvi_device,
};
static struct omap_dss_board_info am3517_evm_dss_data = {
.num_devices = ARRAY_SIZE(am3517_evm_dss_devices),
.devices = am3517_evm_dss_devices,
.default_device = &am3517_evm_lcd_device,
};
static struct platform_device am3517_evm_dss_device = {
.name = "omapdss",
.id = -1,
.dev = {
.platform_data = &am3517_evm_dss_data,
},
};
/*
* Board initialization
*/
static struct omap_board_config_kernel am3517_evm_config[] __initdata = {
};
static struct platform_device *am3517_evm_devices[] __initdata = {
&am3517_evm_dss_device,
};
static void __init am3517_evm_init_irq(void)
{
omap_board_config = am3517_evm_config;
omap_board_config_size = ARRAY_SIZE(am3517_evm_config);
omap2_init_common_hw(NULL, NULL);
omap_init_irq();
}
static struct omap_musb_board_data musb_board_data = {
.interface_type = MUSB_INTERFACE_ULPI,
.mode = MUSB_OTG,
.power = 500,
};
static __init void am3517_evm_musb_init(void)
{
u32 devconf2;
/*
* Set up USB clock/mode in the DEVCONF2 register.
*/
devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
/* USB2.0 PHY reference clock is 13 MHz */
devconf2 &= ~(CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE);
devconf2 |= CONF2_REFFREQ_13MHZ | CONF2_SESENDEN | CONF2_VBDTCTEN
| CONF2_DATPOL;
omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
usb_musb_init(&musb_board_data);
}
static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
.port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
#if defined(CONFIG_PANEL_SHARP_LQ043T1DG01) || \
defined(CONFIG_PANEL_SHARP_LQ043T1DG01_MODULE)
.port_mode[1] = EHCI_HCD_OMAP_MODE_UNKNOWN,
#else
.port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
#endif
.port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
.phy_reset = true,
.reset_gpio_port[0] = 57,
.reset_gpio_port[1] = -EINVAL,
.reset_gpio_port[2] = -EINVAL
};
#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
/* USB OTG DRVVBUS offset = 0x212 */
OMAP3_MUX(SAD2D_MCAD23, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLDOWN),
{ .reg_offset = OMAP_MUX_TERMINATOR },
};
#else
#define board_mux NULL
#endif
static struct resource am3517_hecc_resources[] = {
{
.start = AM35XX_IPSS_HECC_BASE,
.end = AM35XX_IPSS_HECC_BASE + 0x3FFF,
.flags = IORESOURCE_MEM,
},
{
.start = INT_35XX_HECC0_IRQ,
.end = INT_35XX_HECC0_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device am3517_hecc_device = {
.name = "ti_hecc",
.id = -1,
.num_resources = ARRAY_SIZE(am3517_hecc_resources),
.resource = am3517_hecc_resources,
};
static struct ti_hecc_platform_data am3517_evm_hecc_pdata = {
.scc_hecc_offset = AM35XX_HECC_SCC_HECC_OFFSET,
.scc_ram_offset = AM35XX_HECC_SCC_RAM_OFFSET,
.hecc_ram_offset = AM35XX_HECC_RAM_OFFSET,
.mbx_offset = AM35XX_HECC_MBOX_OFFSET,
.int_line = AM35XX_HECC_INT_LINE,
.version = AM35XX_HECC_VERSION,
};
static void am3517_evm_hecc_init(struct ti_hecc_platform_data *pdata)
{
am3517_hecc_device.dev.platform_data = pdata;
platform_device_register(&am3517_hecc_device);
}
static void __init am3517_evm_init(void)
{
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
am3517_evm_i2c_init();
platform_add_devices(am3517_evm_devices,
ARRAY_SIZE(am3517_evm_devices));
omap_serial_init();
/* Configure GPIO for EHCI port */
omap_mux_init_gpio(57, OMAP_PIN_OUTPUT);
usb_ehci_init(&ehci_pdata);
am3517_evm_hecc_init(&am3517_evm_hecc_pdata);
/* DSS */
am3517_evm_display_init();
/* RTC - S35390A */
am3517_evm_rtc_init();
i2c_register_board_info(1, am3517evm_i2c1_boardinfo,
ARRAY_SIZE(am3517evm_i2c1_boardinfo));
/*Ethernet*/
am3517_evm_ethernet_init(&am3517_evm_emac_pdata);
/* MUSB */
am3517_evm_musb_init();
}
MACHINE_START(OMAP3517EVM, "OMAP3517/AM3517 EVM")
.boot_params = 0x80000100,
.map_io = omap3_map_io,
.reserve = omap_reserve,
.init_irq = am3517_evm_init_irq,
.init_machine = am3517_evm_init,
.timer = &omap_timer,
MACHINE_END
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