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linux/arch/arm/mach-ep93xx/vision_ep9307.c
Arnd Bergmann 12c3dca25d ARM: ep93xx: remove MaverickCrunch support 
The MaverickCrunch support for ep93xx never made it into glibc and
was removed from gcc in its 4.8 release in 2012. It is now one of
the last parts of arch/arm/ that fails to build with the clang
integrated assembler, which is unlikely to ever want to support it.

The two alternatives are to force the use of binutils/gas when
building the crunch support, or to remove it entirely.

According to Hartley Sweeten:

 "Martin Guy did a lot of work trying to get the maverick crunch working
  but I was never able to successfully use it for anything. It "kind"
  of works but depending on the EP93xx silicon revision there are still
  a number of hardware bugs that either give imprecise or garbage results.

  I have no problem with removing the kernel support for the maverick
  crunch."

Unless someone else comes up with a good reason to keep it around,
remove it now. This touches mostly the ep93xx platform, but removes
a bit of code from ARM common ptrace and signal frame handling as well.

If there are remaining users of MaverickCrunch, they can use LTS
kernels for at least another five years before kernel support ends.

Link: https://lore.kernel.org/linux-arm-kernel/20210802141245.1146772-1-arnd@kernel.org/
Link: https://lore.kernel.org/linux-arm-kernel/20210226164345.3889993-1-arnd@kernel.org/
Link: https://github.com/ClangBuiltLinux/linux/issues/1272
Link: https://gcc.gnu.org/legacy-ml/gcc/2008-03/msg01063.html
Cc: "Martin Guy" <martinwguy@martinwguy@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-08-04 13:30:04 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/arm/mach-ep93xx/vision_ep9307.c
* Vision Engraving Systems EP9307 SoM support.
*
* Copyright (C) 2008-2011 Vision Engraving Systems
* H Hartley Sweeten <hsweeten@visionengravers.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <linux/fb.h>
#include <linux/io.h>
#include <linux/mtd/partitions.h>
#include <linux/i2c.h>
#include <linux/platform_data/pca953x.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/host.h>
#include <sound/cs4271.h>
#include "hardware.h"
#include <linux/platform_data/video-ep93xx.h>
#include <linux/platform_data/spi-ep93xx.h>
#include "gpio-ep93xx.h"
#include <asm/mach-types.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include "soc.h"
/*************************************************************************
* Static I/O mappings for the FPGA
*************************************************************************/
#define VISION_PHYS_BASE EP93XX_CS7_PHYS_BASE
#define VISION_VIRT_BASE 0xfebff000
static struct map_desc vision_io_desc[] __initdata = {
{
.virtual = VISION_VIRT_BASE,
.pfn = __phys_to_pfn(VISION_PHYS_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static void __init vision_map_io(void)
{
ep93xx_map_io();
iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
}
/*************************************************************************
* Ethernet
*************************************************************************/
static struct ep93xx_eth_data vision_eth_data __initdata = {
.phy_id = 1,
};
/*************************************************************************
* Framebuffer
*************************************************************************/
#define VISION_LCD_ENABLE EP93XX_GPIO_LINE_EGPIO1
static int vision_lcd_setup(struct platform_device *pdev)
{
int err;
err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
dev_name(&pdev->dev));
if (err)
return err;
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
EP93XX_SYSCON_DEVCFG_RASONP3 |
EP93XX_SYSCON_DEVCFG_EXVC);
return 0;
}
static void vision_lcd_teardown(struct platform_device *pdev)
{
gpio_free(VISION_LCD_ENABLE);
}
static void vision_lcd_blank(int blank_mode, struct fb_info *info)
{
if (blank_mode)
gpio_set_value(VISION_LCD_ENABLE, 0);
else
gpio_set_value(VISION_LCD_ENABLE, 1);
}
static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
.flags = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
.setup = vision_lcd_setup,
.teardown = vision_lcd_teardown,
.blank = vision_lcd_blank,
};
/*************************************************************************
* GPIO Expanders
*************************************************************************/
#define PCA9539_74_GPIO_BASE (EP93XX_GPIO_LINE_MAX + 1)
#define PCA9539_75_GPIO_BASE (PCA9539_74_GPIO_BASE + 16)
#define PCA9539_76_GPIO_BASE (PCA9539_75_GPIO_BASE + 16)
#define PCA9539_77_GPIO_BASE (PCA9539_76_GPIO_BASE + 16)
static struct pca953x_platform_data pca953x_74_gpio_data = {
.gpio_base = PCA9539_74_GPIO_BASE,
.irq_base = EP93XX_BOARD_IRQ(0),
};
static struct pca953x_platform_data pca953x_75_gpio_data = {
.gpio_base = PCA9539_75_GPIO_BASE,
.irq_base = -1,
};
static struct pca953x_platform_data pca953x_76_gpio_data = {
.gpio_base = PCA9539_76_GPIO_BASE,
.irq_base = -1,
};
static struct pca953x_platform_data pca953x_77_gpio_data = {
.gpio_base = PCA9539_77_GPIO_BASE,
.irq_base = -1,
};
/*************************************************************************
* I2C Bus
*************************************************************************/
static struct i2c_board_info vision_i2c_info[] __initdata = {
{
I2C_BOARD_INFO("isl1208", 0x6f),
.irq = IRQ_EP93XX_EXT1,
}, {
I2C_BOARD_INFO("pca9539", 0x74),
.platform_data = &pca953x_74_gpio_data,
}, {
I2C_BOARD_INFO("pca9539", 0x75),
.platform_data = &pca953x_75_gpio_data,
}, {
I2C_BOARD_INFO("pca9539", 0x76),
.platform_data = &pca953x_76_gpio_data,
}, {
I2C_BOARD_INFO("pca9539", 0x77),
.platform_data = &pca953x_77_gpio_data,
},
};
/*************************************************************************
* SPI CS4271 Audio Codec
*************************************************************************/
static struct cs4271_platform_data vision_cs4271_data = {
.gpio_nreset = EP93XX_GPIO_LINE_H(2),
};
/*************************************************************************
* SPI Flash
*************************************************************************/
static struct mtd_partition vision_spi_flash_partitions[] = {
{
.name = "SPI bootstrap",
.offset = 0,
.size = SZ_4K,
}, {
.name = "Bootstrap config",
.offset = MTDPART_OFS_APPEND,
.size = SZ_4K,
}, {
.name = "System config",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
static struct flash_platform_data vision_spi_flash_data = {
.name = "SPI Flash",
.parts = vision_spi_flash_partitions,
.nr_parts = ARRAY_SIZE(vision_spi_flash_partitions),
};
/*************************************************************************
* SPI SD/MMC host
*************************************************************************/
static struct mmc_spi_platform_data vision_spi_mmc_data = {
.detect_delay = 100,
.powerup_msecs = 100,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
.caps2 = MMC_CAP2_RO_ACTIVE_HIGH,
};
static struct gpiod_lookup_table vision_spi_mmc_gpio_table = {
.dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */
.table = {
/* Card detect */
GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW),
/* Write protect */
GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH),
{ },
},
};
/*************************************************************************
* SPI Bus
*************************************************************************/
static struct spi_board_info vision_spi_board_info[] __initdata = {
{
.modalias = "cs4271",
.platform_data = &vision_cs4271_data,
.max_speed_hz = 6000000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_3,
}, {
.modalias = "sst25l",
.platform_data = &vision_spi_flash_data,
.max_speed_hz = 20000000,
.bus_num = 0,
.chip_select = 1,
.mode = SPI_MODE_3,
}, {
.modalias = "mmc_spi",
.platform_data = &vision_spi_mmc_data,
.max_speed_hz = 20000000,
.bus_num = 0,
.chip_select = 2,
.mode = SPI_MODE_3,
},
};
static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
.dev_id = "spi0",
.table = {
GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW),
{ },
},
};
static struct ep93xx_spi_info vision_spi_master __initdata = {
.use_dma = 1,
};
/*************************************************************************
* I2S Audio
*************************************************************************/
static struct platform_device vision_audio_device = {
.name = "edb93xx-audio",
.id = -1,
};
static void __init vision_register_i2s(void)
{
ep93xx_register_i2s();
platform_device_register(&vision_audio_device);
}
/*************************************************************************
* Machine Initialization
*************************************************************************/
static void __init vision_init_machine(void)
{
ep93xx_init_devices();
ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
ep93xx_register_eth(&vision_eth_data, 1);
ep93xx_register_fb(&ep93xxfb_info);
ep93xx_register_pwm(1, 0);
/*
* Request the gpio expander's interrupt gpio line now to prevent
* the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
*/
if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
"pca9539:74"))
pr_warn("cannot request interrupt gpio for pca9539:74\n");
vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
ep93xx_register_i2c(vision_i2c_info,
ARRAY_SIZE(vision_i2c_info));
gpiod_add_lookup_table(&vision_spi_mmc_gpio_table);
gpiod_add_lookup_table(&vision_spi_cs_gpio_table);
ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
ARRAY_SIZE(vision_spi_board_info));
vision_register_i2s();
}
MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
/* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
.atag_offset = 0x100,
.map_io = vision_map_io,
.init_irq = ep93xx_init_irq,
.init_time = ep93xx_timer_init,
.init_machine = vision_init_machine,
.restart = ep93xx_restart,
MACHINE_END
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