2007-11-07 05:54:31 +01:00
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/*
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* linux/arch/arm/plat-omap/i2c.c
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*
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* Helper module for board specific I2C bus registration
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*
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* Copyright (C) 2007 Nokia Corporation.
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*
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2009-05-25 20:08:43 +02:00
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* Contact: Jarkko Nikula <jhnikula@gmail.com>
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2007-11-07 05:54:31 +01:00
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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2010-09-21 16:07:15 +02:00
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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2010-05-11 20:35:08 +02:00
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[ARM] fix AT91, davinci, h720x, ks8695, msm, mx2, mx3, netx, omap1, omap2, pxa, s3c
arch/arm/mach-at91/at91cap9.c:337: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91rm9200.c:301: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9260.c:351: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9261.c:287: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9263.c:312: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9rl.c:304: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-h720x/h7202-eval.c:38: error: implicit declaration of function 'IRQ_CHAINED_GPIOB'
arch/arm/mach-ks8695/devices.c:46: error: 'KS8695_IRQ_WAN_RX_STATUS' undeclared here (not in a function)
arch/arm/mach-msm/devices.c:28: error: 'INT_UART1' undeclared here (not in a function)
arch/arm/mach-mx2/devices.c:233: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-mx3/devices.c:128: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:140: error: 'INT_730_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:165: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:200: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap2/board-apollon.c:286: error: implicit declaration of function 'omap_set_gpio_direction'
arch/arm/mach-omap2/mcbsp.c:154: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-omap2/mcbsp.c:181: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-pxa/e350.c:36: error: 'IRQ_BOARD_START' undeclared here (not in a function)
arch/arm/plat-s3c/dev-i2c0.c:32: error: 'IRQ_IIC' undeclared here (not in a function)
...
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-08 11:01:47 +01:00
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#include <mach/irqs.h>
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2010-02-22 21:29:36 +01:00
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#include <plat/i2c.h>
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2010-09-21 16:07:15 +02:00
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#include <plat/omap_device.h>
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2007-11-07 05:54:31 +01:00
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#define OMAP_I2C_SIZE 0x3f
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#define OMAP1_I2C_BASE 0xfffb3800
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2012-09-05 02:43:29 +02:00
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#define OMAP1_INT_I2C (32 + 4)
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2007-11-07 05:54:31 +01:00
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2010-12-09 15:24:16 +01:00
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static const char name[] = "omap_i2c";
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2007-11-07 05:54:31 +01:00
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#define I2C_RESOURCE_BUILDER(base, irq) \
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{ \
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.start = (base), \
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.end = (base) + OMAP_I2C_SIZE, \
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.flags = IORESOURCE_MEM, \
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}, \
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{ \
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.start = (irq), \
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.flags = IORESOURCE_IRQ, \
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},
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static struct resource i2c_resources[][2] = {
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{ I2C_RESOURCE_BUILDER(0, 0) },
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};
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#define I2C_DEV_BUILDER(bus_id, res, data) \
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{ \
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.id = (bus_id), \
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.name = name, \
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.num_resources = ARRAY_SIZE(res), \
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.resource = (res), \
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.dev = { \
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.platform_data = (data), \
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}, \
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}
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2010-09-21 16:07:15 +02:00
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#define MAX_OMAP_I2C_HWMOD_NAME_LEN 16
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#define OMAP_I2C_MAX_CONTROLLERS 4
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static struct omap_i2c_bus_platform_data i2c_pdata[OMAP_I2C_MAX_CONTROLLERS];
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2007-11-07 05:54:31 +01:00
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static struct platform_device omap_i2c_devices[] = {
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2010-05-11 20:35:08 +02:00
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I2C_DEV_BUILDER(1, i2c_resources[0], &i2c_pdata[0]),
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2007-11-07 05:54:31 +01:00
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};
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2009-03-24 02:07:48 +01:00
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#define OMAP_I2C_CMDLINE_SETUP (BIT(31))
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2009-03-24 02:07:47 +01:00
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static int __init omap_i2c_nr_ports(void)
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{
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int ports = 0;
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if (cpu_class_is_omap1())
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ports = 1;
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else if (cpu_is_omap24xx())
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ports = 2;
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else if (cpu_is_omap34xx())
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ports = 3;
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2010-05-20 20:36:43 +02:00
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else if (cpu_is_omap44xx())
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ports = 4;
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2009-03-24 02:07:47 +01:00
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return ports;
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}
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2010-09-21 16:07:15 +02:00
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static inline int omap1_i2c_add_bus(int bus_id)
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2009-03-24 02:07:48 +01:00
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{
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2010-09-21 16:07:15 +02:00
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struct platform_device *pdev;
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struct omap_i2c_bus_platform_data *pdata;
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2010-12-07 05:30:57 +01:00
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struct resource *res;
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2010-09-21 16:07:15 +02:00
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2010-05-20 20:36:43 +02:00
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omap1_i2c_mux_pins(bus_id);
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2010-09-21 16:07:15 +02:00
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pdev = &omap_i2c_devices[bus_id - 1];
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2010-12-07 05:30:57 +01:00
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res = pdev->resource;
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res[0].start = OMAP1_I2C_BASE;
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res[0].end = res[0].start + OMAP_I2C_SIZE;
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2012-09-05 02:43:29 +02:00
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res[1].start = OMAP1_INT_I2C;
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2010-09-21 16:07:15 +02:00
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pdata = &i2c_pdata[bus_id - 1];
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2011-05-30 16:43:06 +02:00
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/* all OMAP1 have IP version 1 register set */
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pdata->rev = OMAP_I2C_IP_VERSION_1;
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2011-05-30 16:43:09 +02:00
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/* all OMAP1 I2C are implemented like this */
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pdata->flags = OMAP_I2C_FLAG_NO_FIFO |
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OMAP_I2C_FLAG_SIMPLE_CLOCK |
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OMAP_I2C_FLAG_16BIT_DATA_REG |
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OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK;
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/* how the cpu bus is wired up differs for 7xx only */
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if (cpu_is_omap7xx())
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pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_1;
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else
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pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2;
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2010-05-20 20:36:43 +02:00
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return platform_device_register(pdev);
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}
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2010-09-21 16:07:15 +02:00
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2011-01-28 01:39:41 +01:00
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#ifdef CONFIG_ARCH_OMAP2PLUS
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2010-09-21 16:07:15 +02:00
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static inline int omap2_i2c_add_bus(int bus_id)
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{
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int l;
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struct omap_hwmod *oh;
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2011-07-21 22:48:45 +02:00
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struct platform_device *pdev;
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2010-09-21 16:07:15 +02:00
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char oh_name[MAX_OMAP_I2C_HWMOD_NAME_LEN];
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struct omap_i2c_bus_platform_data *pdata;
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2011-05-30 16:43:08 +02:00
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struct omap_i2c_dev_attr *dev_attr;
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2010-05-20 20:36:43 +02:00
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2010-09-21 16:07:15 +02:00
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omap2_i2c_mux_pins(bus_id);
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2010-05-20 20:36:43 +02:00
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2010-09-21 16:07:15 +02:00
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l = snprintf(oh_name, MAX_OMAP_I2C_HWMOD_NAME_LEN, "i2c%d", bus_id);
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WARN(l >= MAX_OMAP_I2C_HWMOD_NAME_LEN,
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"String buffer overflow in I2C%d device setup\n", bus_id);
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oh = omap_hwmod_lookup(oh_name);
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if (!oh) {
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pr_err("Could not look up %s\n", oh_name);
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return -EEXIST;
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2009-03-24 02:07:48 +01:00
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}
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2010-09-21 16:07:15 +02:00
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pdata = &i2c_pdata[bus_id - 1];
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2011-05-30 16:43:06 +02:00
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/*
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* pass the hwmod class's CPU-specific knowledge of I2C IP revision in
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2011-05-30 16:43:08 +02:00
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* use, and functionality implementation flags, up to the OMAP I2C
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* driver via platform data
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2011-05-30 16:43:06 +02:00
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*/
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pdata->rev = oh->class->rev;
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2011-05-30 16:43:08 +02:00
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dev_attr = (struct omap_i2c_dev_attr *)oh->dev_attr;
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pdata->flags = dev_attr->flags;
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2011-07-21 22:48:45 +02:00
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pdev = omap_device_build(name, bus_id, oh, pdata,
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2010-09-21 16:07:15 +02:00
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sizeof(struct omap_i2c_bus_platform_data),
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2011-08-10 15:30:09 +02:00
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NULL, 0, 0);
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2011-07-21 22:48:45 +02:00
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WARN(IS_ERR(pdev), "Could not build omap_device for %s\n", name);
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2010-09-21 16:07:15 +02:00
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2011-11-02 12:54:03 +01:00
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return PTR_RET(pdev);
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2009-03-24 02:07:48 +01:00
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}
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2010-12-08 01:25:40 +01:00
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#else
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static inline int omap2_i2c_add_bus(int bus_id)
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{
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return 0;
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}
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#endif
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2009-03-24 02:07:48 +01:00
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2010-05-20 20:36:43 +02:00
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static int __init omap_i2c_add_bus(int bus_id)
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{
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if (cpu_class_is_omap1())
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2010-09-21 16:07:15 +02:00
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return omap1_i2c_add_bus(bus_id);
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2010-05-20 20:36:43 +02:00
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else
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2010-09-21 16:07:15 +02:00
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return omap2_i2c_add_bus(bus_id);
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2010-05-20 20:36:43 +02:00
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}
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2009-03-24 02:07:47 +01:00
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/**
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* omap_i2c_bus_setup - Process command line options for the I2C bus speed
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* @str: String of options
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*
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* This function allow to override the default I2C bus speed for given I2C
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* bus with a command line option.
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*
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* Format: i2c_bus=bus_id,clkrate (in kHz)
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*
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* Returns 1 on success, 0 otherwise.
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*/
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static int __init omap_i2c_bus_setup(char *str)
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{
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int ports;
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int ints[3];
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ports = omap_i2c_nr_ports();
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get_options(str, 3, ints);
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if (ints[0] < 2 || ints[1] < 1 || ints[1] > ports)
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return 0;
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2010-05-11 20:35:08 +02:00
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i2c_pdata[ints[1] - 1].clkrate = ints[2];
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i2c_pdata[ints[1] - 1].clkrate |= OMAP_I2C_CMDLINE_SETUP;
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2009-03-24 02:07:47 +01:00
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return 1;
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}
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__setup("i2c_bus=", omap_i2c_bus_setup);
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2009-03-24 02:07:48 +01:00
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/*
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* Register busses defined in command line but that are not registered with
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* omap_register_i2c_bus from board initialization code.
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*/
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static int __init omap_register_i2c_bus_cmdline(void)
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{
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int i, err = 0;
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2010-05-11 20:35:08 +02:00
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for (i = 0; i < ARRAY_SIZE(i2c_pdata); i++)
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if (i2c_pdata[i].clkrate & OMAP_I2C_CMDLINE_SETUP) {
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i2c_pdata[i].clkrate &= ~OMAP_I2C_CMDLINE_SETUP;
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2009-03-24 02:07:48 +01:00
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err = omap_i2c_add_bus(i + 1);
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if (err)
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goto out;
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}
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out:
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return err;
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}
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subsys_initcall(omap_register_i2c_bus_cmdline);
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|
2009-03-24 02:07:46 +01:00
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/**
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2010-02-22 21:29:36 +01:00
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* omap_register_i2c_bus - register I2C bus with device descriptors
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2009-03-24 02:07:46 +01:00
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* @bus_id: bus id counting from number 1
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* @clkrate: clock rate of the bus in kHz
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* @info: pointer into I2C device descriptor table or NULL
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* @len: number of descriptors in the table
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*
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* Returns 0 on success or an error code.
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*/
|
2010-02-22 21:29:36 +01:00
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int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
|
2007-11-07 05:54:31 +01:00
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struct i2c_board_info const *info,
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unsigned len)
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{
|
2009-03-24 02:07:47 +01:00
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int err;
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2007-11-07 05:54:31 +01:00
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2009-03-24 02:07:47 +01:00
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BUG_ON(bus_id < 1 || bus_id > omap_i2c_nr_ports());
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2007-11-07 05:54:31 +01:00
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if (info) {
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err = i2c_register_board_info(bus_id, info, len);
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if (err)
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return err;
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}
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|
2010-05-11 20:35:08 +02:00
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if (!i2c_pdata[bus_id - 1].clkrate)
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i2c_pdata[bus_id - 1].clkrate = clkrate;
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i2c_pdata[bus_id - 1].clkrate &= ~OMAP_I2C_CMDLINE_SETUP;
|
2007-11-07 05:54:31 +01:00
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2009-03-24 02:07:48 +01:00
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return omap_i2c_add_bus(bus_id);
|
2007-11-07 05:54:31 +01:00
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}
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