arch/xtensa/platforms/xtfpga/setup.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *
  * arch/xtensa/platform/xtavnet/setup.c
  *
  * ...
  *
  * Authors:	Chris Zankel <chris@zankel.net>
  *		Joe Taylor <joe@tensilica.com>
  *
  * Copyright 2001 - 2006 Tensilica Inc.
  */
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/errno.h>
 #include <linux/reboot.h>
 #include <linux/kdev_t.h>
 #include <linux/types.h>
 #include <linux/major.h>
 #include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/of.h>
 #include <linux/clk-provider.h>
 #include <linux/of_address.h>
 #include <linux/slab.h>

 #include <asm/timex.h>
 #include <asm/processor.h>
 #include <asm/platform.h>
 #include <asm/bootparam.h>
 #include <platform/lcd.h>
 #include <platform/hardware.h>

 static int xtfpga_power_off(struct sys_off_data *unused)
 {
 	lcd_disp_at_pos("POWEROFF", 0);
 	local_irq_disable();
 	while (1)
 		cpu_relax();
 	return NOTIFY_DONE;
 }

 static int xtfpga_restart(struct notifier_block *this,
 			  unsigned long event, void *ptr)
 {
 	/* Try software reset first. */
 	WRITE_ONCE(*(u32 *)XTFPGA_SWRST_VADDR, 0xdead);

 	/* If software reset did not work, flush and reset the mmu,
 	 * simulate a processor reset, and jump to the reset vector.
 	 */
 	cpu_reset();

 	return NOTIFY_DONE;
 }

 static struct notifier_block xtfpga_restart_block = {
 	.notifier_call = xtfpga_restart,
 };

 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT

 void __init platform_calibrate_ccount(void)
 {
 	ccount_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
 }

 #endif

 static void __init xtfpga_register_handlers(void)
 {
 	register_restart_handler(&xtfpga_restart_block);
 	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
 				 SYS_OFF_PRIO_DEFAULT,
 				 xtfpga_power_off, NULL);
 }

 #ifdef CONFIG_USE_OF

 static void __init xtfpga_clk_setup(struct device_node *np)
 {
 	void __iomem *base = of_iomap(np, 0);
 	struct clk *clk;
 	u32 freq;

 	if (!base) {
 		pr_err("%pOFn: invalid address\n", np);
 		return;
 	}

 	freq = __raw_readl(base);
 	iounmap(base);
 	clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq);

 	if (IS_ERR(clk)) {
 		pr_err("%pOFn: clk registration failed\n", np);
 		return;
 	}

 	if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) {
 		pr_err("%pOFn: clk provider registration failed\n", np);
 		return;
 	}
 }
 CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup);

 #define MAC_LEN 6
 static void __init update_local_mac(struct device_node *node)
 {
 	struct property *newmac;
 	const u8* macaddr;
 	int prop_len;

 	macaddr = of_get_property(node, "local-mac-address", &prop_len);
 	if (macaddr == NULL || prop_len != MAC_LEN)
 		return;

 	newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
 	if (newmac == NULL)
 		return;

 	newmac->value = newmac + 1;
 	newmac->length = MAC_LEN;
 	newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
 	if (newmac->name == NULL) {
 		kfree(newmac);
 		return;
 	}

 	memcpy(newmac->value, macaddr, MAC_LEN);
 	((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f;
 	of_update_property(node, newmac);
 }

 static int __init machine_setup(void)
 {
 	struct device_node *eth = NULL;

 	if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
 		update_local_mac(eth);
 	of_node_put(eth);

 	xtfpga_register_handlers();

 	return 0;
 }
 arch_initcall(machine_setup);

 #else

 #include <linux/serial_8250.h>
 #include <linux/if.h>
 #include <net/ethoc.h>
 #include <linux/usb/c67x00.h>

 /*----------------------------------------------------------------------------
  *  Ethernet -- OpenCores Ethernet MAC (ethoc driver)
  */

 static struct resource ethoc_res[] = {
 	[0] = { /* register space */
 		.start = OETH_REGS_PADDR,
 		.end   = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
 		.flags = IORESOURCE_MEM,
 	},
 	[1] = { /* buffer space */
 		.start = OETH_SRAMBUFF_PADDR,
 		.end   = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
 		.flags = IORESOURCE_MEM,
 	},
 	[2] = { /* IRQ number */
 		.start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
 		.end   = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
 		.flags = IORESOURCE_IRQ,
 	},
 };

 static struct ethoc_platform_data ethoc_pdata = {
 	/*
 	 * The MAC address for these boards is 00:50:c2:13:6f:xx.
 	 * The last byte (here as zero) is read from the DIP switches on the
 	 * board.
 	 */
 	.hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
 	.phy_id = -1,
 	.big_endian = XCHAL_HAVE_BE,
 };

 static struct platform_device ethoc_device = {
 	.name = "ethoc",
 	.id = -1,
 	.num_resources = ARRAY_SIZE(ethoc_res),
 	.resource = ethoc_res,
 	.dev = {
 		.platform_data = &ethoc_pdata,
 	},
 };

 /*----------------------------------------------------------------------------
  *  USB Host/Device -- Cypress CY7C67300
  */

 static struct resource c67x00_res[] = {
 	[0] = { /* register space */
 		.start = C67X00_PADDR,
 		.end   = C67X00_PADDR + C67X00_SIZE - 1,
 		.flags = IORESOURCE_MEM,
 	},
 	[1] = { /* IRQ number */
 		.start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
 		.end   = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
 		.flags = IORESOURCE_IRQ,
 	},
 };

 static struct c67x00_platform_data c67x00_pdata = {
 	.sie_config = C67X00_SIE1_HOST | C67X00_SIE2_UNUSED,
 	.hpi_regstep = 4,
 };

 static struct platform_device c67x00_device = {
 	.name = "c67x00",
 	.id = -1,
 	.num_resources = ARRAY_SIZE(c67x00_res),
 	.resource = c67x00_res,
 	.dev = {
 		.platform_data = &c67x00_pdata,
 	},
 };

 /*----------------------------------------------------------------------------
  *  UART
  */

 static struct resource serial_resource = {
 	.start	= DUART16552_PADDR,
 	.end	= DUART16552_PADDR + 0x1f,
 	.flags	= IORESOURCE_MEM,
 };

 static struct plat_serial8250_port serial_platform_data[] = {
 	[0] = {
 		.mapbase	= DUART16552_PADDR,
 		.irq		= XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM),
 		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
 				  UPF_IOREMAP,
 		.iotype		= XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
 		.regshift	= 2,
 		.uartclk	= 0,    /* set in xtavnet_init() */
 	},
 	{ },
 };

 static struct platform_device xtavnet_uart = {
 	.name		= "serial8250",
 	.id		= PLAT8250_DEV_PLATFORM,
 	.dev		= {
 		.platform_data	= serial_platform_data,
 	},
 	.num_resources	= 1,
 	.resource	= &serial_resource,
 };

 /* platform devices */
 static struct platform_device *platform_devices[] __initdata = {
 	&ethoc_device,
 	&c67x00_device,
 	&xtavnet_uart,
 };


 static int __init xtavnet_init(void)
 {
 	/* Ethernet MAC address.  */
 	ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR;

 	/* Clock rate varies among FPGA bitstreams; board specific FPGA register
 	 * reports the actual clock rate.
 	 */
 	serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR;


 	/* register platform devices */
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));

 	/* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
 	 * knows whether they set it correctly on the DIP switches.
 	 */
 	pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
 	ethoc_pdata.eth_clkfreq = *(long *)XTFPGA_CLKFRQ_VADDR;

 	xtfpga_register_handlers();

 	return 0;
 }

 /*
  * Register to be done during do_initcalls().
  */
 arch_initcall(xtavnet_init);

 #endif /* CONFIG_USE_OF */
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	*
	* arch/xtensa/platform/xtavnet/setup.c
	*
	* ...
	*
	* Authors: Chris Zankel <chris@zankel.net>
	* Joe Taylor <joe@tensilica.com>
	*
	* Copyright 2001 - 2006 Tensilica Inc.
	*/
	#include <linux/stddef.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/errno.h>
	#include <linux/reboot.h>
	#include <linux/kdev_t.h>
	#include <linux/types.h>
	#include <linux/major.h>
	#include <linux/console.h>
	#include <linux/delay.h>
	#include <linux/of.h>
	#include <linux/clk-provider.h>
	#include <linux/of_address.h>
	#include <linux/slab.h>

	#include <asm/timex.h>
	#include <asm/processor.h>
	#include <asm/platform.h>
	#include <asm/bootparam.h>
	#include <platform/lcd.h>
	#include <platform/hardware.h>

	static int xtfpga_power_off(struct sys_off_data *unused)
	{
	lcd_disp_at_pos("POWEROFF", 0);
	local_irq_disable();
	while (1)
	cpu_relax();
	return NOTIFY_DONE;
	}

	static int xtfpga_restart(struct notifier_block *this,
	unsigned long event, void *ptr)
	{
	/* Try software reset first. */
	WRITE_ONCE((u32 )XTFPGA_SWRST_VADDR, 0xdead);

	/* If software reset did not work, flush and reset the mmu,
	* simulate a processor reset, and jump to the reset vector.
	*/
	cpu_reset();

	return NOTIFY_DONE;
	}

	static struct notifier_block xtfpga_restart_block = {
	.notifier_call = xtfpga_restart,
	};

	#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT

	void __init platform_calibrate_ccount(void)
	{
	ccount_freq = (long )XTFPGA_CLKFRQ_VADDR;
	}

	#endif

	static void __init xtfpga_register_handlers(void)
	{
	register_restart_handler(&xtfpga_restart_block);
	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
	SYS_OFF_PRIO_DEFAULT,
	xtfpga_power_off, NULL);
	}

	#ifdef CONFIG_USE_OF

	static void __init xtfpga_clk_setup(struct device_node *np)
	{
	void __iomem *base = of_iomap(np, 0);
	struct clk *clk;
	u32 freq;

	if (!base) {
	pr_err("%pOFn: invalid address\n", np);
	return;
	}

	freq = __raw_readl(base);
	iounmap(base);
	clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq);

	if (IS_ERR(clk)) {
	pr_err("%pOFn: clk registration failed\n", np);
	return;
	}

	if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) {
	pr_err("%pOFn: clk provider registration failed\n", np);
	return;
	}
	}
	CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup);

	#define MAC_LEN 6
	static void __init update_local_mac(struct device_node *node)
	{
	struct property *newmac;
	const u8* macaddr;
	int prop_len;

	macaddr = of_get_property(node, "local-mac-address", &prop_len);
	if (macaddr == NULL \|\| prop_len != MAC_LEN)
	return;

	newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
	if (newmac == NULL)
	return;

	newmac->value = newmac + 1;
	newmac->length = MAC_LEN;
	newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
	if (newmac->name == NULL) {
	kfree(newmac);
	return;
	}

	memcpy(newmac->value, macaddr, MAC_LEN);
	((u8)newmac->value)[5] = ((u32*)DIP_SWITCHES_VADDR) & 0x3f;
	of_update_property(node, newmac);
	}

	static int __init machine_setup(void)
	{
	struct device_node *eth = NULL;

	if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
	update_local_mac(eth);
	of_node_put(eth);

	xtfpga_register_handlers();

	return 0;
	}
	arch_initcall(machine_setup);

	#else

	#include <linux/serial_8250.h>
	#include <linux/if.h>
	#include <net/ethoc.h>
	#include <linux/usb/c67x00.h>

	/*----------------------------------------------------------------------------
	* Ethernet -- OpenCores Ethernet MAC (ethoc driver)
	*/

	static struct resource ethoc_res[] = {
	[0] = { /* register space */
	.start = OETH_REGS_PADDR,
	.end = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
	.flags = IORESOURCE_MEM,
	},
	[1] = { /* buffer space */
	.start = OETH_SRAMBUFF_PADDR,
	.end = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
	.flags = IORESOURCE_MEM,
	},
	[2] = { /* IRQ number */
	.start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
	.end = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct ethoc_platform_data ethoc_pdata = {
	/*
	* The MAC address for these boards is 00:50:c2:13:6f:xx.
	* The last byte (here as zero) is read from the DIP switches on the
	* board.
	*/
	.hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
	.phy_id = -1,
	.big_endian = XCHAL_HAVE_BE,
	};

	static struct platform_device ethoc_device = {
	.name = "ethoc",
	.id = -1,
	.num_resources = ARRAY_SIZE(ethoc_res),
	.resource = ethoc_res,
	.dev = {
	.platform_data = &ethoc_pdata,
	},
	};

	/*----------------------------------------------------------------------------
	* USB Host/Device -- Cypress CY7C67300
	*/

	static struct resource c67x00_res[] = {
	[0] = { /* register space */
	.start = C67X00_PADDR,
	.end = C67X00_PADDR + C67X00_SIZE - 1,
	.flags = IORESOURCE_MEM,
	},
	[1] = { /* IRQ number */
	.start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
	.end = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct c67x00_platform_data c67x00_pdata = {
	.sie_config = C67X00_SIE1_HOST \| C67X00_SIE2_UNUSED,
	.hpi_regstep = 4,
	};

	static struct platform_device c67x00_device = {
	.name = "c67x00",
	.id = -1,
	.num_resources = ARRAY_SIZE(c67x00_res),
	.resource = c67x00_res,
	.dev = {
	.platform_data = &c67x00_pdata,
	},
	};

	/*----------------------------------------------------------------------------
	* UART
	*/

	static struct resource serial_resource = {
	.start = DUART16552_PADDR,
	.end = DUART16552_PADDR + 0x1f,
	.flags = IORESOURCE_MEM,
	};

	static struct plat_serial8250_port serial_platform_data[] = {
	[0] = {
	.mapbase = DUART16552_PADDR,
	.irq = XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM),
	.flags = UPF_BOOT_AUTOCONF \| UPF_SKIP_TEST \|
	UPF_IOREMAP,
	.iotype = XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
	.regshift = 2,
	.uartclk = 0, /* set in xtavnet_init() */
	},
	{ },
	};

	static struct platform_device xtavnet_uart = {
	.name = "serial8250",
	.id = PLAT8250_DEV_PLATFORM,
	.dev = {
	.platform_data = serial_platform_data,
	},
	.num_resources = 1,
	.resource = &serial_resource,
	};

	/* platform devices */
	static struct platform_device *platform_devices[] __initdata = {
	&ethoc_device,
	&c67x00_device,
	&xtavnet_uart,
	};


	static int __init xtavnet_init(void)
	{
	/* Ethernet MAC address. */
	ethoc_pdata.hwaddr[5] = (u32 )DIP_SWITCHES_VADDR;

	/* Clock rate varies among FPGA bitstreams; board specific FPGA register
	* reports the actual clock rate.
	*/
	serial_platform_data[0].uartclk = (long )XTFPGA_CLKFRQ_VADDR;


	/* register platform devices */
	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));

	/* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
	* knows whether they set it correctly on the DIP switches.
	*/
	pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
	ethoc_pdata.eth_clkfreq = (long )XTFPGA_CLKFRQ_VADDR;

	xtfpga_register_handlers();

	return 0;
	}

	/*
	* Register to be done during do_initcalls().
	*/
	arch_initcall(xtavnet_init);

	#endif /* CONFIG_USE_OF */