[POWERPC] ppc32: fix CPCI405 board support

Hi,

this patch brings the CPCI405 board support up to date and fixes several
outstanding issues:

       -add bios_fixup()
       -enable RTC only when CONFIG_GEN_RTC defined
       -corrected CompactPCI interrupt map
       -added cpci405_early_serial_map for correct UART clocking
       -removed unused code

Matthias

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 140 insertions, 31 deletions

diff --git a/arch/ppc/platforms/4xx/Kconfig b/arch/ppc/platforms/4xx/Kconfig
index 174ddbc9758b..293bd489e7d9 100644
--- a/arch/ppc/platforms/4xx/Kconfig
+++ b/arch/ppc/platforms/4xx/Kconfig
@@ -183,7 +183,7 @@ config IBM_EMAC4
 
 config BIOS_FIXUP
         bool
-        depends on BUBINGA || EP405 || SYCAMORE || WALNUT
+        depends on BUBINGA || EP405 || SYCAMORE || WALNUT || CPCI405
         default y
 
 # OAK doesn't exist but wanted to keep this around for any future 403GCX boards
diff --git a/arch/ppc/platforms/4xx/cpci405.c b/arch/ppc/platforms/4xx/cpci405.c
index 6571e39fbe48..970b69831e6f 100644
--- a/arch/ppc/platforms/4xx/cpci405.c
+++ b/arch/ppc/platforms/4xx/cpci405.c
@@ -1,10 +1,12 @@
 /*
  * Board setup routines for the esd CPCI-405 cPCI Board.
  *
- * Author: Stefan Roese
- *         stefan.roese@esd-electronics.com
+ * Copyright 2001-2006 esd electronic system design - hannover germany
  *
- * Copyright 2001 esd electronic system design - hannover germany
+ * Authors: Matthias Fuchs
+ *          matthias.fuchs@esd-electronics.com
+ *          Stefan Roese
+ *          stefan.roese@esd-electronics.com
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -20,9 +22,17 @@
 #include <asm/pci-bridge.h>
 #include <asm/machdep.h>
 #include <asm/todc.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
 #include <asm/ocp.h>
+#include <asm/ibm_ocp_pci.h>
+#include <platforms/4xx/ibm405gp.h>
 
+#ifdef CONFIG_GEN_RTC
 void *cpci405_nvram;
+#endif
+
+extern bd_t __res;
 
 /*
  * Some IRQs unique to CPCI-405.
@@ -36,18 +46,69 @@ ppc405_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
          *      A       B       C       D
          */
         {
-                {28,    28,     28,     28},    /* IDSEL 15 - cPCI slot 8 */
-                {29,    29,     29,     29},    /* IDSEL 16 - cPCI slot 7 */
-                {30,    30,     30,     30},    /* IDSEL 17 - cPCI slot 6 */
-                {27,    27,     27,     27},    /* IDSEL 18 - cPCI slot 5 */
-                {28,    28,     28,     28},    /* IDSEL 19 - cPCI slot 4 */
-                {29,    29,     29,     29},    /* IDSEL 20 - cPCI slot 3 */
-                {30,    30,     30,     30},    /* IDSEL 21 - cPCI slot 2 */
+                {28,    29,     30,     27},    /* IDSEL 15 - cPCI slot 8 */
+                {29,    30,     27,     28},    /* IDSEL 16 - cPCI slot 7 */
+                {30,    27,     28,     29},    /* IDSEL 17 - cPCI slot 6 */
+                {27,    28,     29,     30},    /* IDSEL 18 - cPCI slot 5 */
+                {28,    29,     30,     27},    /* IDSEL 19 - cPCI slot 4 */
+                {29,    30,     27,     28},    /* IDSEL 20 - cPCI slot 3 */
+                {30,    27,     28,     29},    /* IDSEL 21 - cPCI slot 2 */
         };
         const long min_idsel = 15, max_idsel = 21, irqs_per_slot = 4;
         return PCI_IRQ_TABLE_LOOKUP;
 };
 
+/* The serial clock for the chip is an internal clock determined by
+ * different clock speeds/dividers.
+ * Calculate the proper input baud rate and setup the serial driver.
+ */
+static void __init
+cpci405_early_serial_map(void)
+{
+        u32 uart_div;
+        int uart_clock;
+        struct uart_port port;
+
+         /* Calculate the serial clock input frequency
+          *
+          * The uart clock is the cpu frequency (provided in the board info
+          * structure) divided by the external UART Divisor.
+          */
+        uart_div = ((mfdcr(DCRN_CHCR_BASE) & CHR0_UDIV) >> 1) + 1;
+        uart_clock = __res.bi_procfreq / uart_div;
+
+        /* Setup serial port access */
+        memset(&port, 0, sizeof(port));
+#if defined(CONFIG_UART0_TTYS0)
+        port.membase = (void*)UART0_IO_BASE;
+        port.irq = UART0_INT;
+#else
+        port.membase = (void*)UART1_IO_BASE;
+        port.irq = UART1_INT;
+#endif
+        port.uartclk = uart_clock;
+        port.regshift = 0;
+        port.iotype = UPIO_MEM;
+        port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
+        port.line = 0;
+
+        if (early_serial_setup(&port) != 0) {
+                printk("Early serial init of port 0 failed\n");
+        }
+#if defined(CONFIG_UART0_TTYS0)
+        port.membase = (void*)UART1_IO_BASE;
+        port.irq = UART1_INT;
+#else
+        port.membase = (void*)UART0_IO_BASE;
+        port.irq = UART0_INT;
+#endif
+        port.line = 1;
+
+        if (early_serial_setup(&port) != 0) {
+                printk("Early serial init of port 1 failed\n");
+        }
+}
+
 void __init
 cpci405_setup_arch(void)
 {
@@ -55,14 +116,68 @@ cpci405_setup_arch(void)
 
         ibm_ocp_set_emac(0, 0);
 
-        TODC_INIT(TODC_TYPE_MK48T35, cpci405_nvram, cpci405_nvram, cpci405_nvram, 8);
+        cpci405_early_serial_map();
+
+#ifdef CONFIG_GEN_RTC
+        TODC_INIT(TODC_TYPE_MK48T35,
+                  cpci405_nvram, cpci405_nvram, cpci405_nvram, 8);
+#endif
+}
+
+void __init
+bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
+{
+        unsigned int bar_response, bar;
+
+        /* 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), 0x00000001);
+
+        /* 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);
+        out_le32((void *) &(pcip->ptm2la), 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);
+        }
 }
 
 void __init
 cpci405_map_io(void)
 {
         ppc4xx_map_io();
+
+#ifdef CONFIG_GEN_RTC
         cpci405_nvram = ioremap(CPCI405_NVRAM_PADDR, CPCI405_NVRAM_SIZE);
+#endif
 }
 
 void __init
@@ -74,9 +189,11 @@ platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
         ppc_md.setup_arch = cpci405_setup_arch;
         ppc_md.setup_io_mappings = cpci405_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
 }
diff --git a/arch/ppc/platforms/4xx/cpci405.h b/arch/ppc/platforms/4xx/cpci405.h
index e27f7cb650d8..f5a5c0cd062d 100644
--- a/arch/ppc/platforms/4xx/cpci405.h
+++ b/arch/ppc/platforms/4xx/cpci405.h
@@ -1,37 +1,29 @@
 /*
  * CPCI-405 board specific definitions
  *
- * Copyright (c) 2001 Stefan Roese (stefan.roese@esd-electronics.com)
+ * Copyright 2001-2006 esd electronic system design - hannover germany
+ *
+ * Authors: Matthias Fuchs
+ *          matthias.fuchs@esd-electronics.com
+ *          Stefan Roese
+ *          stefan.roese@esd-electronics.com
  */
 
 #ifdef __KERNEL__
-#ifndef __ASM_CPCI405_H__
-#define __ASM_CPCI405_H__
+#ifndef __CPCI405_H__
+#define __CPCI405_H__
 
 #include <linux/config.h>
-
-/* We have a 405GP core */
 #include <platforms/4xx/ibm405gp.h>
-
 #include <asm/ppcboot.h>
 
-#ifndef __ASSEMBLY__
-/* Some 4xx parts use a different timebase frequency from the internal clock.
-*/
-#define bi_tbfreq bi_intfreq
-
 /* Map for the NVRAM space */
 #define CPCI405_NVRAM_PADDR     ((uint)0xf0200000)
 #define CPCI405_NVRAM_SIZE      ((uint)32*1024)
 
-#ifdef CONFIG_PPC405GP_INTERNAL_CLOCK
-#define BASE_BAUD               201600
-#else
-#define BASE_BAUD               691200
-#endif
+#define BASE_BAUD               0
 
-#define PPC4xx_MACHINE_NAME "esd CPCI-405"
+#define PPC4xx_MACHINE_NAME     "esd CPCI-405"
 
-#endif /* !__ASSEMBLY__ */
-#endif  /* __ASM_CPCI405_H__ */
+#endif  /* __CPCI405_H__ */
 #endif /* __KERNEL__ */