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3e3c62ca53
On the U8500 platform there are four GPIO blocks, each with a 4K address space, including the peripheral identification. However, each of these blocks have a varying number of banks, each of which have 32 GPIOs and an interrupt line. The current nomadik-gpio driver implementation can handle each of these sub-banks easily with one instance each, but cannot as-is be hooked up to them because it is an AMBA driver and it expects to see a peripheral with the appropriate peripheral ids but having only one bank and only one interrupt. Solve this by converting the driver to a platform driver. Acked-by: Alessandro Rubini <rubini@unipv.it> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
159 lines
4.0 KiB
C
159 lines
4.0 KiB
C
/*
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* Copyright STMicroelectronics, 2007.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/amba/bus.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <mach/hardware.h>
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#include <mach/irqs.h>
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#include <asm/mach/map.h>
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#include <asm/hardware/vic.h>
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#include <asm/cacheflush.h>
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#include <asm/hardware/cache-l2x0.h>
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#define __MEM_4K_RESOURCE(x) \
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.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
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/* The 8815 has 4 GPIO blocks, let's register them immediately */
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#define GPIO_RESOURCE(block) \
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{ \
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.start = NOMADIK_GPIO##block##_BASE, \
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.end = NOMADIK_GPIO##block##_BASE + SZ_4K - 1, \
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.flags = IORESOURCE_MEM, \
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}, \
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{ \
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.start = IRQ_GPIO##block, \
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.end = IRQ_GPIO##block, \
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.flags = IORESOURCE_IRQ, \
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}
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#define GPIO_DEVICE(block) \
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{ \
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.name = "gpio", \
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.id = block, \
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.num_resources = 2, \
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.resource = &cpu8815_gpio_resources[block * 2], \
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.dev = { \
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.platform_data = &cpu8815_gpio[block], \
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}, \
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}
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static struct nmk_gpio_platform_data cpu8815_gpio[] = {
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{
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.name = "GPIO-0-31",
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.first_gpio = 0,
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.first_irq = NOMADIK_GPIO_TO_IRQ(0),
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}, {
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.name = "GPIO-32-63",
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.first_gpio = 32,
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.first_irq = NOMADIK_GPIO_TO_IRQ(32),
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}, {
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.name = "GPIO-64-95",
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.first_gpio = 64,
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.first_irq = NOMADIK_GPIO_TO_IRQ(64),
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}, {
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.name = "GPIO-96-127", /* 124..127 not routed to pin */
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.first_gpio = 96,
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.first_irq = NOMADIK_GPIO_TO_IRQ(96),
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}
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};
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static struct resource cpu8815_gpio_resources[] = {
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GPIO_RESOURCE(0),
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GPIO_RESOURCE(1),
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GPIO_RESOURCE(2),
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GPIO_RESOURCE(3),
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};
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static struct platform_device cpu8815_platform_gpio[] = {
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GPIO_DEVICE(0),
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GPIO_DEVICE(1),
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GPIO_DEVICE(2),
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GPIO_DEVICE(3),
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};
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static struct amba_device cpu8815_amba_rng = {
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.dev = {
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.init_name = "rng",
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},
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__MEM_4K_RESOURCE(NOMADIK_RNG_BASE),
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};
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static struct platform_device *platform_devs[] __initdata = {
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cpu8815_platform_gpio + 0,
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cpu8815_platform_gpio + 1,
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cpu8815_platform_gpio + 2,
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cpu8815_platform_gpio + 3,
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};
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static struct amba_device *amba_devs[] __initdata = {
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&cpu8815_amba_rng
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};
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static int __init cpu8815_init(void)
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{
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int i;
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platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
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for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
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amba_device_register(amba_devs[i], &iomem_resource);
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return 0;
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}
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arch_initcall(cpu8815_init);
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/* All SoC devices live in the same area (see hardware.h) */
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static struct map_desc nomadik_io_desc[] __initdata = {
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{
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.virtual = NOMADIK_IO_VIRTUAL,
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.pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL),
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.length = NOMADIK_IO_SIZE,
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.type = MT_DEVICE,
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}
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/* static ram and secured ram may be added later */
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};
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void __init cpu8815_map_io(void)
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{
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iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
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}
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void __init cpu8815_init_irq(void)
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{
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/* This modified VIC cell has two register blocks, at 0 and 0x20 */
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vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0);
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vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
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}
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/*
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* This function is called from the board init ("init_machine").
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*/
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void __init cpu8815_platform_init(void)
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{
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#ifdef CONFIG_CACHE_L2X0
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/* At full speed latency must be >=2, so 0x249 in low bits */
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l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
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#endif
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return;
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}
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