arch/ppc/platforms/4xx/walnut.c - kernel/msm-4.19 - Gitiles

 /*
  * arch/ppc/platforms/4xx/walnut.c
  *
  * Architecture- / platform-specific boot-time initialization code for
  * IBM PowerPC 4xx based boards. Adapted from original
  * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
  * <dan@net4x.com>.
  *
  * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
  *
  * 2002 (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/config.h>
 #include <linux/init.h>
 #include <linux/smp.h>
 #include <linux/threads.h>
 #include <linux/param.h>
 #include <linux/string.h>
 #include <linux/pci.h>
 #include <linux/rtc.h>

 #include <asm/system.h>
 #include <asm/pci-bridge.h>
 #include <asm/machdep.h>
 #include <asm/page.h>
 #include <asm/time.h>
 #include <asm/io.h>
 #include <asm/ocp.h>
 #include <asm/ibm_ocp_pci.h>
 #include <asm/todc.h>

 #undef DEBUG

 #ifdef DEBUG
 #define DBG(x...) printk(x)
 #else
 #define DBG(x...)
 #endif

 void *kb_cs;
 void *kb_data;
 void *walnut_rtc_base;

 /* Some IRQs unique to Walnut.
  * Used by the generic 405 PCI setup functions in ppc4xx_pci.c
  */
 int __init
 ppc405_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
 	     */
 	{
 		{28, 28, 28, 28},	/* IDSEL 1 - PCI slot 1 */
 		{29, 29, 29, 29},	/* IDSEL 2 - PCI slot 2 */
 		{30, 30, 30, 30},	/* IDSEL 3 - PCI slot 3 */
 		{31, 31, 31, 31},	/* IDSEL 4 - PCI slot 4 */
 	};

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

 void __init
 walnut_setup_arch(void)
 {

 	void *fpga_brdc;
 	unsigned char fpga_brdc_data;
 	void *fpga_enable;
 	void *fpga_polarity;
 	void *fpga_status;
 	void *fpga_trigger;

 	ppc4xx_setup_arch();

 	ibm_ocp_set_emac(0, 0);

 	kb_data = ioremap(WALNUT_PS2_BASE, 8);
 	if (!kb_data) {
 		printk(KERN_CRIT
 		       "walnut_setup_arch() kb_data ioremap failed\n");
 		return;
 	}

 	kb_cs = kb_data + 1;

 	fpga_status = ioremap(PPC40x_FPGA_BASE, 8);
 	if (!fpga_status) {
 		printk(KERN_CRIT
 		       "walnut_setup_arch() fpga_status ioremap failed\n");
 		return;
 	}

 	fpga_enable = fpga_status + 1;
 	fpga_polarity = fpga_status + 2;
 	fpga_trigger = fpga_status + 3;
 	fpga_brdc = fpga_status + 4;

 	/* split the keyboard and mouse interrupts */
 	fpga_brdc_data = readb(fpga_brdc);
 	fpga_brdc_data |= 0x80;
 	writeb(fpga_brdc_data, fpga_brdc);

 	writeb(0x3, fpga_enable);

 	writeb(0x3, fpga_polarity);

 	writeb(0x3, fpga_trigger);

 	/* RTC step for the walnut */
 	walnut_rtc_base = (void *) WALNUT_RTC_VADDR;
 	TODC_INIT(TODC_TYPE_DS1743, walnut_rtc_base, walnut_rtc_base,
 		  walnut_rtc_base, 8);
 	/* Identify the system */
 	printk("IBM Walnut port (C) 2000-2002 MontaVista Software, Inc. (source@mvista.com)\n");
 }

 void __init
 bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
 {
 #ifdef CONFIG_PCI
 	unsigned int bar_response, bar;
 	/*
 	 * Expected PCI mapping:
 	 *
 	 *  PLB addr             PCI memory addr
 	 *  ---------------------       ---------------------
 	 *  0000'0000 - 7fff'ffff <---  0000'0000 - 7fff'ffff
 	 *  8000'0000 - Bfff'ffff --->  8000'0000 - Bfff'ffff
 	 *
 	 *  PLB addr             PCI io addr
 	 *  ---------------------       ---------------------
 	 *  e800'0000 - e800'ffff --->  0000'0000 - 0001'0000
 	 *
 	 * The following code is simplified by assuming that the bootrom
 	 * has been well behaved in following this mapping.
 	 */

 #ifdef DEBUG
 	int i;

 	printk("ioremap PCLIO_BASE = 0x%x\n", pcip);
 	printk("PCI bridge regs before fixup \n");
 	for (i = 0; i <= 3; i++) {
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
 	}
 	printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
 	printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
 	printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
 	printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));

 #endif

 	/* added for IBM boot rom version 1.15 bios bar changes  -AK */

 	/* Disable region first */
 	out_le32((void *) &(pcip->pmm[0].ma), 0x00000000);
 	/* PLB starting addr, PCI: 0x80000000 */
 	out_le32((void *) &(pcip->pmm[0].la), 0x80000000);
 	/* PCI start addr, 0x80000000 */
 	out_le32((void *) &(pcip->pmm[0].pcila), PPC405_PCI_MEM_BASE);
 	/* 512MB range of PLB to PCI */
 	out_le32((void *) &(pcip->pmm[0].pciha), 0x00000000);
 	/* Enable no pre-fetch, enable region */
 	out_le32((void *) &(pcip->pmm[0].ma), ((0xffffffff -
 						(PPC405_PCI_UPPER_MEM -
 						 PPC405_PCI_MEM_BASE)) | 0x01));

 	/* Disable region one */
 	out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
 	out_le32((void *) &(pcip->pmm[1].la), 0x00000000);
 	out_le32((void *) &(pcip->pmm[1].pcila), 0x00000000);
 	out_le32((void *) &(pcip->pmm[1].pciha), 0x00000000);
 	out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
 	out_le32((void *) &(pcip->ptm1ms), 0x00000000);

 	/* Disable region two */
 	out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
 	out_le32((void *) &(pcip->pmm[2].la), 0x00000000);
 	out_le32((void *) &(pcip->pmm[2].pcila), 0x00000000);
 	out_le32((void *) &(pcip->pmm[2].pciha), 0x00000000);
 	out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
 	out_le32((void *) &(pcip->ptm2ms), 0x00000000);

 	/* Zero config bars */
 	for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
 		early_write_config_dword(hose, hose->first_busno,
 					 PCI_FUNC(hose->first_busno), bar,
 					 0x00000000);
 		early_read_config_dword(hose, hose->first_busno,
 					PCI_FUNC(hose->first_busno), bar,
 					&bar_response);
 		DBG("BUS %d, device %d, Function %d bar 0x%8.8x is 0x%8.8x\n",
 		    hose->first_busno, PCI_SLOT(hose->first_busno),
 		    PCI_FUNC(hose->first_busno), bar, bar_response);
 	}
 	/* end work arround */

 #ifdef DEBUG
 	printk("PCI bridge regs after fixup \n");
 	for (i = 0; i <= 3; i++) {
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
 		printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
 	}
 	printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
 	printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
 	printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
 	printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));

 #endif
 #endif
 }

 void __init
 walnut_map_io(void)
 {
 	ppc4xx_map_io();
 	io_block_mapping(WALNUT_RTC_VADDR,
 			 WALNUT_RTC_PADDR, WALNUT_RTC_SIZE, _PAGE_IO);
 }

 void __init
 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	      unsigned long r6, unsigned long r7)
 {
 	ppc4xx_init(r3, r4, r5, r6, r7);

 	ppc_md.setup_arch = walnut_setup_arch;
 	ppc_md.setup_io_mappings = walnut_map_io;

 #ifdef CONFIG_GEN_RTC
 	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.nvram_read_val = todc_direct_read_val;
 	ppc_md.nvram_write_val = todc_direct_write_val;
 #endif
 }
	/*
	* arch/ppc/platforms/4xx/walnut.c
	*
	* Architecture- / platform-specific boot-time initialization code for
	* IBM PowerPC 4xx based boards. Adapted from original
	* code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
	* <dan@net4x.com>.
	*
	* Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
	*
	* 2002 (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/config.h>
	#include <linux/init.h>
	#include <linux/smp.h>
	#include <linux/threads.h>
	#include <linux/param.h>
	#include <linux/string.h>
	#include <linux/pci.h>
	#include <linux/rtc.h>

	#include <asm/system.h>
	#include <asm/pci-bridge.h>
	#include <asm/machdep.h>
	#include <asm/page.h>
	#include <asm/time.h>
	#include <asm/io.h>
	#include <asm/ocp.h>
	#include <asm/ibm_ocp_pci.h>
	#include <asm/todc.h>

	#undef DEBUG

	#ifdef DEBUG
	#define DBG(x...) printk(x)
	#else
	#define DBG(x...)
	#endif

	void *kb_cs;
	void *kb_data;
	void *walnut_rtc_base;

	/* Some IRQs unique to Walnut.
	* Used by the generic 405 PCI setup functions in ppc4xx_pci.c
	*/
	int __init
	ppc405_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
	*/
	{
	{28, 28, 28, 28}, /* IDSEL 1 - PCI slot 1 */
	{29, 29, 29, 29}, /* IDSEL 2 - PCI slot 2 */
	{30, 30, 30, 30}, /* IDSEL 3 - PCI slot 3 */
	{31, 31, 31, 31}, /* IDSEL 4 - PCI slot 4 */
	};

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

	void __init
	walnut_setup_arch(void)
	{

	void *fpga_brdc;
	unsigned char fpga_brdc_data;
	void *fpga_enable;
	void *fpga_polarity;
	void *fpga_status;
	void *fpga_trigger;

	ppc4xx_setup_arch();

	ibm_ocp_set_emac(0, 0);

	kb_data = ioremap(WALNUT_PS2_BASE, 8);
	if (!kb_data) {
	printk(KERN_CRIT
	"walnut_setup_arch() kb_data ioremap failed\n");
	return;
	}

	kb_cs = kb_data + 1;

	fpga_status = ioremap(PPC40x_FPGA_BASE, 8);
	if (!fpga_status) {
	printk(KERN_CRIT
	"walnut_setup_arch() fpga_status ioremap failed\n");
	return;
	}

	fpga_enable = fpga_status + 1;
	fpga_polarity = fpga_status + 2;
	fpga_trigger = fpga_status + 3;
	fpga_brdc = fpga_status + 4;

	/* split the keyboard and mouse interrupts */
	fpga_brdc_data = readb(fpga_brdc);
	fpga_brdc_data \|= 0x80;
	writeb(fpga_brdc_data, fpga_brdc);

	writeb(0x3, fpga_enable);

	writeb(0x3, fpga_polarity);

	writeb(0x3, fpga_trigger);

	/* RTC step for the walnut */
	walnut_rtc_base = (void *) WALNUT_RTC_VADDR;
	TODC_INIT(TODC_TYPE_DS1743, walnut_rtc_base, walnut_rtc_base,
	walnut_rtc_base, 8);
	/* Identify the system */
	printk("IBM Walnut port (C) 2000-2002 MontaVista Software, Inc. (source@mvista.com)\n");
	}

	void __init
	bios_fixup(struct pci_controller hose, struct pcil0_regs pcip)
	{
	#ifdef CONFIG_PCI
	unsigned int bar_response, bar;
	/*
	* Expected PCI mapping:
	*
	* PLB addr PCI memory addr
	* --------------------- ---------------------
	* 0000'0000 - 7fff'ffff <--- 0000'0000 - 7fff'ffff
	* 8000'0000 - Bfff'ffff ---> 8000'0000 - Bfff'ffff
	*
	* PLB addr PCI io addr
	* --------------------- ---------------------
	* e800'0000 - e800'ffff ---> 0000'0000 - 0001'0000
	*
	* The following code is simplified by assuming that the bootrom
	* has been well behaved in following this mapping.
	*/

	#ifdef DEBUG
	int i;

	printk("ioremap PCLIO_BASE = 0x%x\n", pcip);
	printk("PCI bridge regs before fixup \n");
	for (i = 0; i <= 3; i++) {
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
	}
	printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
	printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
	printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
	printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));

	#endif

	/* added for IBM boot rom version 1.15 bios bar changes -AK */

	/* Disable region first */
	out_le32((void *) &(pcip->pmm[0].ma), 0x00000000);
	/* PLB starting addr, PCI: 0x80000000 */
	out_le32((void *) &(pcip->pmm[0].la), 0x80000000);
	/* PCI start addr, 0x80000000 */
	out_le32((void *) &(pcip->pmm[0].pcila), PPC405_PCI_MEM_BASE);
	/* 512MB range of PLB to PCI */
	out_le32((void *) &(pcip->pmm[0].pciha), 0x00000000);
	/* Enable no pre-fetch, enable region */
	out_le32((void *) &(pcip->pmm[0].ma), ((0xffffffff -
	(PPC405_PCI_UPPER_MEM -
	PPC405_PCI_MEM_BASE)) \| 0x01));

	/* Disable region one */
	out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
	out_le32((void *) &(pcip->pmm[1].la), 0x00000000);
	out_le32((void *) &(pcip->pmm[1].pcila), 0x00000000);
	out_le32((void *) &(pcip->pmm[1].pciha), 0x00000000);
	out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
	out_le32((void *) &(pcip->ptm1ms), 0x00000000);

	/* Disable region two */
	out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
	out_le32((void *) &(pcip->pmm[2].la), 0x00000000);
	out_le32((void *) &(pcip->pmm[2].pcila), 0x00000000);
	out_le32((void *) &(pcip->pmm[2].pciha), 0x00000000);
	out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
	out_le32((void *) &(pcip->ptm2ms), 0x00000000);

	/* Zero config bars */
	for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
	early_write_config_dword(hose, hose->first_busno,
	PCI_FUNC(hose->first_busno), bar,
	0x00000000);
	early_read_config_dword(hose, hose->first_busno,
	PCI_FUNC(hose->first_busno), bar,
	&bar_response);
	DBG("BUS %d, device %d, Function %d bar 0x%8.8x is 0x%8.8x\n",
	hose->first_busno, PCI_SLOT(hose->first_busno),
	PCI_FUNC(hose->first_busno), bar, bar_response);
	}
	/* end work arround */

	#ifdef DEBUG
	printk("PCI bridge regs after fixup \n");
	for (i = 0; i <= 3; i++) {
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
	printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
	}
	printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
	printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
	printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
	printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));

	#endif
	#endif
	}

	void __init
	walnut_map_io(void)
	{
	ppc4xx_map_io();
	io_block_mapping(WALNUT_RTC_VADDR,
	WALNUT_RTC_PADDR, WALNUT_RTC_SIZE, _PAGE_IO);
	}

	void __init
	platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
	unsigned long r6, unsigned long r7)
	{
	ppc4xx_init(r3, r4, r5, r6, r7);

	ppc_md.setup_arch = walnut_setup_arch;
	ppc_md.setup_io_mappings = walnut_map_io;

	#ifdef CONFIG_GEN_RTC
	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.nvram_read_val = todc_direct_read_val;
	ppc_md.nvram_write_val = todc_direct_write_val;
	#endif
	}