arch/ppc/platforms/spruce.c - kernel/msm-4.19 - Gitiles

 /*
  * Board and PCI setup routines for IBM Spruce
  *
  * Author: MontaVista Software <source@mvista.com>
  *
  * 2000-2004 (c) MontaVista, Software, Inc.  This file is licensed under
  * the terms of the GNU General Public License version 2.  This program
  * is licensed "as is" without any warranty of any kind, whether express
  * or implied.
  */

 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/reboot.h>
 #include <linux/pci.h>
 #include <linux/kdev_t.h>
 #include <linux/types.h>
 #include <linux/major.h>
 #include <linux/initrd.h>
 #include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/serial_core.h>
 #include <linux/serial_8250.h>

 #include <asm/system.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/dma.h>
 #include <asm/io.h>
 #include <asm/machdep.h>
 #include <asm/time.h>
 #include <asm/todc.h>
 #include <asm/bootinfo.h>
 #include <asm/kgdb.h>

 #include <syslib/cpc700.h>

 #include "spruce.h"

 static inline int
 spruce_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
 {
 	static char pci_irq_table[][4] =
 		/*
 		 * 	PCI IDSEL/INTPIN->INTLINE
 		 * 	A	B	C	D
 		 */
 	{
 		{23, 24, 25, 26},	/* IDSEL 1 - PCI slot 3 */
 		{24, 25, 26, 23},	/* IDSEL 2 - PCI slot 2 */
 		{25, 26, 23, 24},	/* IDSEL 3 - PCI slot 1 */
 		{26, 23, 24, 25},	/* IDSEL 4 - PCI slot 0 */
 	};

 	const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
 	return PCI_IRQ_TABLE_LOOKUP;
 }

 static void __init
 spruce_setup_hose(void)
 {
 	struct pci_controller *hose;

 	/* Setup hose */
 	hose = pcibios_alloc_controller();
 	if (!hose)
 		return;

 	hose->first_busno = 0;
 	hose->last_busno = 0xff;

 	pci_init_resource(&hose->io_resource,
 			SPRUCE_PCI_LOWER_IO,
 			SPRUCE_PCI_UPPER_IO,
 			IORESOURCE_IO,
 			"PCI host bridge");

 	pci_init_resource(&hose->mem_resources[0],
 			SPRUCE_PCI_LOWER_MEM,
 			SPRUCE_PCI_UPPER_MEM,
 			IORESOURCE_MEM,
 			"PCI host bridge");

 	hose->io_space.start = SPRUCE_PCI_LOWER_IO;
 	hose->io_space.end = SPRUCE_PCI_UPPER_IO;
 	hose->mem_space.start = SPRUCE_PCI_LOWER_MEM;
 	hose->mem_space.end = SPRUCE_PCI_UPPER_MEM;
 	hose->io_base_virt = (void *)SPRUCE_ISA_IO_BASE;

 	setup_indirect_pci(hose,
 			SPRUCE_PCI_CONFIG_ADDR,
 			SPRUCE_PCI_CONFIG_DATA);

 	hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);

 	ppc_md.pci_swizzle = common_swizzle;
 	ppc_md.pci_map_irq = spruce_map_irq;
 }

 /*
  * CPC700 PIC interrupt programming table
  *
  * First entry is the sensitivity (level/edge), second is the polarity.
  */
 unsigned int cpc700_irq_assigns[32][2] = {
 	{ 1, 1 },       /* IRQ  0: ECC Correctable Error - rising edge */
 	{ 1, 1 },       /* IRQ  1: PCI Write Mem Range   - rising edge */
 	{ 0, 1 },       /* IRQ  2: PCI Write Command Reg - active high */
 	{ 0, 1 },       /* IRQ  3: UART 0                - active high */
 	{ 0, 1 },       /* IRQ  4: UART 1                - active high */
 	{ 0, 1 },       /* IRQ  5: ICC 0                 - active high */
 	{ 0, 1 },       /* IRQ  6: ICC 1                 - active high */
 	{ 0, 1 },       /* IRQ  7: GPT Compare 0         - active high */
 	{ 0, 1 },       /* IRQ  8: GPT Compare 1         - active high */
 	{ 0, 1 },       /* IRQ  9: GPT Compare 2         - active high */
 	{ 0, 1 },       /* IRQ 10: GPT Compare 3         - active high */
 	{ 0, 1 },       /* IRQ 11: GPT Compare 4         - active high */
 	{ 0, 1 },       /* IRQ 12: GPT Capture 0         - active high */
 	{ 0, 1 },       /* IRQ 13: GPT Capture 1         - active high */
 	{ 0, 1 },       /* IRQ 14: GPT Capture 2         - active high */
 	{ 0, 1 },       /* IRQ 15: GPT Capture 3         - active high */
 	{ 0, 1 },       /* IRQ 16: GPT Capture 4         - active high */
 	{ 0, 0 },       /* IRQ 17: Reserved */
 	{ 0, 0 },       /* IRQ 18: Reserved */
 	{ 0, 0 },       /* IRQ 19: Reserved */
 	{ 0, 1 },       /* IRQ 20: FPGA EXT_IRQ0         - active high */
 	{ 1, 1 },       /* IRQ 21: Mouse                 - rising edge */
 	{ 1, 1 },       /* IRQ 22: Keyboard              - rising edge */
 	{ 0, 0 },       /* IRQ 23: PCI Slot 3            - active low */
 	{ 0, 0 },       /* IRQ 24: PCI Slot 2            - active low */
 	{ 0, 0 },       /* IRQ 25: PCI Slot 1            - active low */
 	{ 0, 0 },       /* IRQ 26: PCI Slot 0            - active low */
 };

 static void __init
 spruce_calibrate_decr(void)
 {
 	int freq, divisor = 4;

 	/* determine processor bus speed */
 	freq = SPRUCE_BUS_SPEED;
 	tb_ticks_per_jiffy = freq / HZ / divisor;
 	tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
 }

 static int
 spruce_show_cpuinfo(struct seq_file *m)
 {
 	seq_printf(m, "vendor\t\t: IBM\n");
 	seq_printf(m, "machine\t\t: Spruce\n");

 	return 0;
 }

 static void __init
 spruce_early_serial_map(void)
 {
 	u32 uart_clk;
 	struct uart_port serial_req;

 	if (SPRUCE_UARTCLK_IS_33M(readb(SPRUCE_FPGA_REG_A)))
 		uart_clk = SPRUCE_BAUD_33M * 16;
 	else
 		uart_clk = SPRUCE_BAUD_30M * 16;

 	/* Setup serial port access */
 	memset(&serial_req, 0, sizeof(serial_req));
 	serial_req.uartclk = uart_clk;
 	serial_req.irq = UART0_INT;
 	serial_req.flags = UPF_BOOT_AUTOCONF;
 	serial_req.iotype = UPIO_MEM;
 	serial_req.membase = (u_char *)UART0_IO_BASE;
 	serial_req.regshift = 0;

 #if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
 	gen550_init(0, &serial_req);
 #endif
 #ifdef CONFIG_SERIAL_8250
 	if (early_serial_setup(&serial_req) != 0)
 		printk("Early serial init of port 0 failed\n");
 #endif

 	/* Assume early_serial_setup() doesn't modify serial_req */
 	serial_req.line = 1;
 	serial_req.irq = UART1_INT;
 	serial_req.membase = (u_char *)UART1_IO_BASE;

 #if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
 	gen550_init(1, &serial_req);
 #endif
 #ifdef CONFIG_SERIAL_8250
 	if (early_serial_setup(&serial_req) != 0)
 		printk("Early serial init of port 1 failed\n");
 #endif
 }

 TODC_ALLOC();

 static void __init
 spruce_setup_arch(void)
 {
 	/* Setup TODC access */
 	TODC_INIT(TODC_TYPE_DS1643, 0, 0, SPRUCE_RTC_BASE_ADDR, 8);

 	/* init to some ~sane value until calibrate_delay() runs */
 	loops_per_jiffy = 50000000 / HZ;

 	/* Setup PCI host bridge */
 	spruce_setup_hose();

 #ifdef CONFIG_BLK_DEV_INITRD
 	if (initrd_start)
 		ROOT_DEV = Root_RAM0;
 	else
 #endif
 #ifdef CONFIG_ROOT_NFS
 		ROOT_DEV = Root_NFS;
 #else
 		ROOT_DEV = Root_SDA1;
 #endif

 	/* Identify the system */
 	printk(KERN_INFO "System Identification: IBM Spruce\n");
 	printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
 }

 static void
 spruce_restart(char *cmd)
 {
 	local_irq_disable();

 	/* SRR0 has system reset vector, SRR1 has default MSR value */
 	/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
 	__asm__ __volatile__
 	("\n\
 	lis	3,0xfff0	\n\
 	ori	3,3,0x0100	\n\
 	mtspr	26,3		\n\
 	li	3,0		\n\
 	mtspr	27,3		\n\
 	rfi			\n\
 	");
 	for(;;);
 }

 static void
 spruce_power_off(void)
 {
 	for(;;);
 }

 static void
 spruce_halt(void)
 {
 	spruce_restart(NULL);
 }

 static void __init
 spruce_map_io(void)
 {
 	io_block_mapping(SPRUCE_PCI_IO_BASE, SPRUCE_PCI_PHY_IO_BASE,
 			 0x08000000, _PAGE_IO);
 }

 /*
  * Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
  */
 static __inline__ void
 spruce_set_bat(void)
 {
 	mb();
 	mtspr(SPRN_DBAT1U, 0xf8000ffe);
 	mtspr(SPRN_DBAT1L, 0xf800002a);
 	mb();
 }

 void __init
 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	      unsigned long r6, unsigned long r7)
 {
 	parse_bootinfo(find_bootinfo());

 	/* Map in board regs, etc. */
 	spruce_set_bat();

 	isa_io_base = SPRUCE_ISA_IO_BASE;
 	pci_dram_offset = SPRUCE_PCI_SYS_MEM_BASE;

 	ppc_md.setup_arch = spruce_setup_arch;
 	ppc_md.show_cpuinfo = spruce_show_cpuinfo;
 	ppc_md.init_IRQ = cpc700_init_IRQ;
 	ppc_md.get_irq = cpc700_get_irq;

 	ppc_md.setup_io_mappings = spruce_map_io;

 	ppc_md.restart = spruce_restart;
 	ppc_md.power_off = spruce_power_off;
 	ppc_md.halt = spruce_halt;

 	ppc_md.time_init = todc_time_init;
 	ppc_md.set_rtc_time = todc_set_rtc_time;
 	ppc_md.get_rtc_time = todc_get_rtc_time;
 	ppc_md.calibrate_decr = spruce_calibrate_decr;

 	ppc_md.nvram_read_val = todc_direct_read_val;
 	ppc_md.nvram_write_val = todc_direct_write_val;

 	spruce_early_serial_map();

 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 	ppc_md.progress = gen550_progress;
 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
 #ifdef CONFIG_KGDB
 	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
 #endif
 }
	/*
	* Board and PCI setup routines for IBM Spruce
	*
	* Author: MontaVista Software <source@mvista.com>
	*
	* 2000-2004 (c) MontaVista, Software, Inc. This file is licensed under
	* the terms of the GNU General Public License version 2. This program
	* is licensed "as is" without any warranty of any kind, whether express
	* or implied.
	*/

	#include <linux/stddef.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/errno.h>
	#include <linux/reboot.h>
	#include <linux/pci.h>
	#include <linux/kdev_t.h>
	#include <linux/types.h>
	#include <linux/major.h>
	#include <linux/initrd.h>
	#include <linux/console.h>
	#include <linux/delay.h>
	#include <linux/seq_file.h>
	#include <linux/root_dev.h>
	#include <linux/serial.h>
	#include <linux/tty.h>
	#include <linux/serial_core.h>
	#include <linux/serial_8250.h>

	#include <asm/system.h>
	#include <asm/pgtable.h>
	#include <asm/page.h>
	#include <asm/dma.h>
	#include <asm/io.h>
	#include <asm/machdep.h>
	#include <asm/time.h>
	#include <asm/todc.h>
	#include <asm/bootinfo.h>
	#include <asm/kgdb.h>

	#include <syslib/cpc700.h>

	#include "spruce.h"

	static inline int
	spruce_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
	{
	static char pci_irq_table[][4] =
	/*
	* PCI IDSEL/INTPIN->INTLINE
	* A B C D
	*/
	{
	{23, 24, 25, 26}, /* IDSEL 1 - PCI slot 3 */
	{24, 25, 26, 23}, /* IDSEL 2 - PCI slot 2 */
	{25, 26, 23, 24}, /* IDSEL 3 - PCI slot 1 */
	{26, 23, 24, 25}, /* IDSEL 4 - PCI slot 0 */
	};

	const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
	}

	static void __init
	spruce_setup_hose(void)
	{
	struct pci_controller *hose;

	/* Setup hose */
	hose = pcibios_alloc_controller();
	if (!hose)
	return;

	hose->first_busno = 0;
	hose->last_busno = 0xff;

	pci_init_resource(&hose->io_resource,
	SPRUCE_PCI_LOWER_IO,
	SPRUCE_PCI_UPPER_IO,
	IORESOURCE_IO,
	"PCI host bridge");

	pci_init_resource(&hose->mem_resources[0],
	SPRUCE_PCI_LOWER_MEM,
	SPRUCE_PCI_UPPER_MEM,
	IORESOURCE_MEM,
	"PCI host bridge");

	hose->io_space.start = SPRUCE_PCI_LOWER_IO;
	hose->io_space.end = SPRUCE_PCI_UPPER_IO;
	hose->mem_space.start = SPRUCE_PCI_LOWER_MEM;
	hose->mem_space.end = SPRUCE_PCI_UPPER_MEM;
	hose->io_base_virt = (void *)SPRUCE_ISA_IO_BASE;

	setup_indirect_pci(hose,
	SPRUCE_PCI_CONFIG_ADDR,
	SPRUCE_PCI_CONFIG_DATA);

	hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);

	ppc_md.pci_swizzle = common_swizzle;
	ppc_md.pci_map_irq = spruce_map_irq;
	}

	/*
	* CPC700 PIC interrupt programming table
	*
	* First entry is the sensitivity (level/edge), second is the polarity.
	*/
	unsigned int cpc700_irq_assigns[32][2] = {
	{ 1, 1 }, /* IRQ 0: ECC Correctable Error - rising edge */
	{ 1, 1 }, /* IRQ 1: PCI Write Mem Range - rising edge */
	{ 0, 1 }, /* IRQ 2: PCI Write Command Reg - active high */
	{ 0, 1 }, /* IRQ 3: UART 0 - active high */
	{ 0, 1 }, /* IRQ 4: UART 1 - active high */
	{ 0, 1 }, /* IRQ 5: ICC 0 - active high */
	{ 0, 1 }, /* IRQ 6: ICC 1 - active high */
	{ 0, 1 }, /* IRQ 7: GPT Compare 0 - active high */
	{ 0, 1 }, /* IRQ 8: GPT Compare 1 - active high */
	{ 0, 1 }, /* IRQ 9: GPT Compare 2 - active high */
	{ 0, 1 }, /* IRQ 10: GPT Compare 3 - active high */
	{ 0, 1 }, /* IRQ 11: GPT Compare 4 - active high */
	{ 0, 1 }, /* IRQ 12: GPT Capture 0 - active high */
	{ 0, 1 }, /* IRQ 13: GPT Capture 1 - active high */
	{ 0, 1 }, /* IRQ 14: GPT Capture 2 - active high */
	{ 0, 1 }, /* IRQ 15: GPT Capture 3 - active high */
	{ 0, 1 }, /* IRQ 16: GPT Capture 4 - active high */
	{ 0, 0 }, /* IRQ 17: Reserved */
	{ 0, 0 }, /* IRQ 18: Reserved */
	{ 0, 0 }, /* IRQ 19: Reserved */
	{ 0, 1 }, /* IRQ 20: FPGA EXT_IRQ0 - active high */
	{ 1, 1 }, /* IRQ 21: Mouse - rising edge */
	{ 1, 1 }, /* IRQ 22: Keyboard - rising edge */
	{ 0, 0 }, /* IRQ 23: PCI Slot 3 - active low */
	{ 0, 0 }, /* IRQ 24: PCI Slot 2 - active low */
	{ 0, 0 }, /* IRQ 25: PCI Slot 1 - active low */
	{ 0, 0 }, /* IRQ 26: PCI Slot 0 - active low */
	};

	static void __init
	spruce_calibrate_decr(void)
	{
	int freq, divisor = 4;

	/* determine processor bus speed */
	freq = SPRUCE_BUS_SPEED;
	tb_ticks_per_jiffy = freq / HZ / divisor;
	tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
	}

	static int
	spruce_show_cpuinfo(struct seq_file *m)
	{
	seq_printf(m, "vendor\t\t: IBM\n");
	seq_printf(m, "machine\t\t: Spruce\n");

	return 0;
	}

	static void __init
	spruce_early_serial_map(void)
	{
	u32 uart_clk;
	struct uart_port serial_req;

	if (SPRUCE_UARTCLK_IS_33M(readb(SPRUCE_FPGA_REG_A)))
	uart_clk = SPRUCE_BAUD_33M * 16;
	else
	uart_clk = SPRUCE_BAUD_30M * 16;

	/* Setup serial port access */
	memset(&serial_req, 0, sizeof(serial_req));
	serial_req.uartclk = uart_clk;
	serial_req.irq = UART0_INT;
	serial_req.flags = UPF_BOOT_AUTOCONF;
	serial_req.iotype = UPIO_MEM;
	serial_req.membase = (u_char *)UART0_IO_BASE;
	serial_req.regshift = 0;

	#if defined(CONFIG_KGDB) \|\| defined(CONFIG_SERIAL_TEXT_DEBUG)
	gen550_init(0, &serial_req);
	#endif
	#ifdef CONFIG_SERIAL_8250
	if (early_serial_setup(&serial_req) != 0)
	printk("Early serial init of port 0 failed\n");
	#endif

	/* Assume early_serial_setup() doesn't modify serial_req */
	serial_req.line = 1;
	serial_req.irq = UART1_INT;
	serial_req.membase = (u_char *)UART1_IO_BASE;

	#if defined(CONFIG_KGDB) \|\| defined(CONFIG_SERIAL_TEXT_DEBUG)
	gen550_init(1, &serial_req);
	#endif
	#ifdef CONFIG_SERIAL_8250
	if (early_serial_setup(&serial_req) != 0)
	printk("Early serial init of port 1 failed\n");
	#endif
	}

	TODC_ALLOC();

	static void __init
	spruce_setup_arch(void)
	{
	/* Setup TODC access */
	TODC_INIT(TODC_TYPE_DS1643, 0, 0, SPRUCE_RTC_BASE_ADDR, 8);

	/* init to some ~sane value until calibrate_delay() runs */
	loops_per_jiffy = 50000000 / HZ;

	/* Setup PCI host bridge */
	spruce_setup_hose();

	#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
	ROOT_DEV = Root_RAM0;
	else
	#endif
	#ifdef CONFIG_ROOT_NFS
	ROOT_DEV = Root_NFS;
	#else
	ROOT_DEV = Root_SDA1;
	#endif

	/* Identify the system */
	printk(KERN_INFO "System Identification: IBM Spruce\n");
	printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
	}

	static void
	spruce_restart(char *cmd)
	{
	local_irq_disable();

	/* SRR0 has system reset vector, SRR1 has default MSR value */
	/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
	__asm__ __volatile__
	("\n\
	lis 3,0xfff0 \n\
	ori 3,3,0x0100 \n\
	mtspr 26,3 \n\
	li 3,0 \n\
	mtspr 27,3 \n\
	rfi \n\
	");
	for(;;);
	}

	static void
	spruce_power_off(void)
	{
	for(;;);
	}

	static void
	spruce_halt(void)
	{
	spruce_restart(NULL);
	}

	static void __init
	spruce_map_io(void)
	{
	io_block_mapping(SPRUCE_PCI_IO_BASE, SPRUCE_PCI_PHY_IO_BASE,
	0x08000000, _PAGE_IO);
	}

	/*
	* Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
	*/
	static __inline__ void
	spruce_set_bat(void)
	{
	mb();
	mtspr(SPRN_DBAT1U, 0xf8000ffe);
	mtspr(SPRN_DBAT1L, 0xf800002a);
	mb();
	}

	void __init
	platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
	unsigned long r6, unsigned long r7)
	{
	parse_bootinfo(find_bootinfo());

	/* Map in board regs, etc. */
	spruce_set_bat();

	isa_io_base = SPRUCE_ISA_IO_BASE;
	pci_dram_offset = SPRUCE_PCI_SYS_MEM_BASE;

	ppc_md.setup_arch = spruce_setup_arch;
	ppc_md.show_cpuinfo = spruce_show_cpuinfo;
	ppc_md.init_IRQ = cpc700_init_IRQ;
	ppc_md.get_irq = cpc700_get_irq;

	ppc_md.setup_io_mappings = spruce_map_io;

	ppc_md.restart = spruce_restart;
	ppc_md.power_off = spruce_power_off;
	ppc_md.halt = spruce_halt;

	ppc_md.time_init = todc_time_init;
	ppc_md.set_rtc_time = todc_set_rtc_time;
	ppc_md.get_rtc_time = todc_get_rtc_time;
	ppc_md.calibrate_decr = spruce_calibrate_decr;

	ppc_md.nvram_read_val = todc_direct_read_val;
	ppc_md.nvram_write_val = todc_direct_write_val;

	spruce_early_serial_map();

	#ifdef CONFIG_SERIAL_TEXT_DEBUG
	ppc_md.progress = gen550_progress;
	#endif /* CONFIG_SERIAL_TEXT_DEBUG */
	#ifdef CONFIG_KGDB
	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
	#endif
	}