patch-2.4.22 linux-2.4.22/arch/ppc/platforms/walnut.c
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- Lines: 483
- Date:
2003-08-25 04:44:40.000000000 -0700
- Orig file:
linux-2.4.21/arch/ppc/platforms/walnut.c
- Orig date:
2003-06-13 07:51:31.000000000 -0700
diff -urN linux-2.4.21/arch/ppc/platforms/walnut.c linux-2.4.22/arch/ppc/platforms/walnut.c
@@ -1,288 +1,250 @@
/*
*
- * Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
+ * Copyrigh t(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
*
- * Module name: walnut_setup.c
+ * Copyright 2000-2002 MontaVista Software Inc.
+ * Completed implementation.
+ * Author: MontaVista Software, Inc. <source@mvista.com>
+ *
+ * Module name: walnut.c
*
* Description:
* Architecture- / platform-specific boot-time initialization code for
- * the IBM PowerPC 403GP "Walnut" evaluation board. Adapted from original
+ * IBM PowerPC 4xx based boards. Adapted from original
* code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
* <dan@net4x.com>.
*
+ * Please read the COPYING file for all license details.
*/
-
#include <linux/config.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/threads.h>
-#include <linux/interrupt.h>
#include <linux/param.h>
#include <linux/string.h>
#include <linux/blk.h>
-#include <linux/seq_file.h>
+#include <linux/pci.h>
+#include <linux/rtc.h>
+#include <asm/system.h>
+#include <asm/pci-bridge.h>
#include <asm/processor.h>
-#include <asm/board.h>
#include <asm/machdep.h>
#include <asm/page.h>
-
-#include "ppc4xx_pic.h"
#include <asm/time.h>
-#include "walnut_setup.h"
-
-
-/* Function Prototypes */
-
-extern void abort(void);
-
-/* Global Variables */
-
-unsigned char __res[sizeof(bd_t)];
-
-
-/*
- * void __init walnut_init()
- *
- * Description:
- * This routine...
- *
- * Input(s):
- * r3 - Optional pointer to a board information structure.
- * r4 - Optional pointer to the physical starting address of the init RAM
- * disk.
- * r5 - Optional pointer to the physical ending address of the init RAM
- * disk.
- * r6 - Optional pointer to the physical starting address of any kernel
- * command-line parameters.
- * r7 - Optional pointer to the physical ending address of any kernel
- * command-line parameters.
- *
- * Output(s):
- * N/A
- *
- * Returns:
- * N/A
- *
+#include <asm/io.h>
+#include <asm/todc.h>
+#include <platforms/ibm_ocp.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;
+
+#ifdef CONFIG_PCI
+/* 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;
+};
+#endif
+
void __init
-walnut_init(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7)
+board_setup_arch(void)
{
- /*
- * If we were passed in a board information, copy it into the
- * residual data area.
- */
- if (r3) {
- memcpy((void *)__res, (void *)(r3 + KERNELBASE), sizeof(bd_t));
- }
+#define WALNUT_PS2_BASE 0xF0100000
+#define WALNUT_FPGA_BASE 0xF0300000
-#if defined(CONFIG_BLK_DEV_INITRD)
- /*
- * If the init RAM disk has been configured in, and there's a valid
- * starting address for it, set it up.
- */
- if (r4) {
- initrd_start = r4 + KERNELBASE;
- initrd_end = r5 + KERNELBASE;
+ void *fpga_brdc;
+ unsigned char fpga_brdc_data;
+ void *fpga_enable;
+ void *fpga_polarity;
+ void *fpga_status;
+ void *fpga_trigger;
+
+ kb_data = ioremap(WALNUT_PS2_BASE, 8);
+ if (!kb_data) {
+ printk(KERN_CRIT
+ "walnut_setup_arch() kb_data ioremap failed\n");
+ return;
}
-#endif /* CONFIG_BLK_DEV_INITRD */
- /* Copy the kernel command line arguments to a safe place. */
+ kb_cs = kb_data + 1;
- if (r6) {
- *(char *)(r7 + KERNELBASE) = 0;
- strcpy(cmd_line, (char *)(r6 + KERNELBASE));
+ fpga_status = ioremap(WALNUT_FPGA_BASE, 8);
+ if (!fpga_status) {
+ printk(KERN_CRIT
+ "walnut_setup_arch() fpga_status ioremap failed\n");
+ return;
}
- /* Initialize machine-dependency vectors */
+ fpga_enable = fpga_status + 1;
+ fpga_polarity = fpga_status + 2;
+ fpga_trigger = fpga_status + 3;
+ fpga_brdc = fpga_status + 4;
- ppc_md.setup_arch = walnut_setup_arch;
- ppc_md.show_percpuinfo = walnut_show_percpuinfo;
- ppc_md.irq_cannonicalize = NULL;
- ppc_md.init_IRQ = walnut_init_IRQ;
- ppc_md.get_irq = walnut_get_irq;
- ppc_md.init = NULL;
-
- ppc_md.restart = walnut_restart;
- ppc_md.power_off = walnut_power_off;
- ppc_md.halt = walnut_halt;
-
- ppc_md.time_init = walnut_time_init;
- ppc_md.set_rtc_time = walnut_set_rtc_time;
- ppc_md.get_rtc_time = walnut_get_rtc_time;
- ppc_md.calibrate_decr = walnut_calibrate_decr;
-
- ppc_md.kbd_setkeycode = NULL;
- ppc_md.kbd_getkeycode = NULL;
- ppc_md.kbd_translate = NULL;
- ppc_md.kbd_unexpected_up = NULL;
- ppc_md.kbd_leds = NULL;
- ppc_md.kbd_init_hw = NULL;
- ppc_md.ppc_kbd_sysrq_xlate = NULL;
-}
+ /* split the keyboard and mouse interrupts */
+ fpga_brdc_data = readb(fpga_brdc);
+ fpga_brdc_data |= 0x80;
+ writeb(fpga_brdc_data, fpga_brdc);
-/*
- * Document me.
- */
-void __init
-walnut_setup_arch(void)
-{
- /* XXX - Implement me */
-}
+ writeb(0x3, fpga_enable);
-/*
- * int walnut_show_percpuinfo()
- *
- * Description:
- * This routine pretty-prints the platform's internal CPU and bus clock
- * frequencies into the buffer for usage in /proc/cpuinfo.
- *
- * Input(s):
- * *buffer - Buffer into which CPU and bus clock frequencies are to be
- * printed.
- *
- * Output(s):
- * *buffer - Buffer with the CPU and bus clock frequencies.
- *
- * Returns:
- * The number of bytes copied into 'buffer' if OK, otherwise zero or less
- * on error.
- */
-int
-walnut_show_percpuinfo(struct seq_file *m)
-{
- bd_t *bp = (bd_t *)__res;
+ writeb(0x3, fpga_polarity);
- seq_printf(m, "clock\t\t: %dMHz\n"
- "bus clock\t\t: %dMHz\n",
- bp->bi_intfreq / 1000000,
- bp->bi_busfreq / 1000000);
+ writeb(0x3, fpga_trigger);
- return 0;
+ /* 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");
}
-/*
- * Document me.
- */
+#ifdef CONFIG_PCI
void __init
-walnut_init_IRQ(void)
+bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
{
- int i;
-
- ppc4xx_pic_init();
- for (i = 0; i < NR_IRQS; i++) {
- irq_desc[i].handler = ppc4xx_pic;
- }
-
- return;
-}
-
-/*
- * Document me.
- */
-int
-walnut_get_irq(struct pt_regs *regs)
-{
- return (ppc4xx_pic_get_irq(regs));
-}
+ 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.
+ */
-/*
- * Document me.
- */
-void
-walnut_restart(char *cmd)
-{
- abort();
-}
+#ifdef DEBUG
+ int i;
-/*
- * Document me.
- */
-void
-walnut_power_off(void)
-{
- walnut_restart(NULL);
-}
+ 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 */
-/*
- * Document me.
- */
-void
-walnut_halt(void)
-{
- walnut_restart(NULL);
-}
+#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)));
-/*
- * Document me.
- */
-long __init
-walnut_time_init(void)
-{
- /* XXX - Implement me */
- return 0;
+#endif
}
+#endif
-/*
- * Document me.
- */
-int __init
-walnut_set_rtc_time(unsigned long time)
+void __init
+board_io_mapping(void)
{
- /* XXX - Implement me */
-
- return (0);
+ io_block_mapping(WALNUT_RTC_VADDR,
+ WALNUT_RTC_PADDR, WALNUT_RTC_SIZE, _PAGE_IO);
}
-/*
- * Document me.
- */
-unsigned long __init
-walnut_get_rtc_time(void)
+void __init
+board_setup_irq(void)
{
- /* XXX - Implement me */
-
- return (0);
}
-/*
- * void __init walnut_calibrate_decr()
- *
- * Description:
- * This routine retrieves the internal processor frequency from the board
- * information structure, sets up the kernel timer decrementer based on
- * that value, enables the 403 programmable interval timer (PIT) and sets
- * it up for auto-reload.
- *
- * Input(s):
- * N/A
- *
- * Output(s):
- * N/A
- *
- * Returns:
- * N/A
- *
- */
void __init
-walnut_calibrate_decr(void)
+board_init(void)
{
- unsigned int freq;
- bd_t *bip = (bd_t *)__res;
-
- freq = bip->bi_intfreq;
-
- decrementer_count = freq / HZ;
- count_period_num = 1;
- count_period_den = freq;
-
- /* Enable the PIT and set auto-reload of its value */
-
- mtspr(SPRN_TCR, TCR_PIE | TCR_ARE);
-
- /* Clear any pending timer interrupts */
-
- mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_PIS | TSR_FIS);
+ 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;
}
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