patch-2.4.22 linux-2.4.22/arch/mips/sibyte/sb1250/setup.c

• Lines: 217
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/mips/sibyte/sb1250/setup.c
• Orig date: 2002-11-28 15:53:10.000000000 -0800

diff -urN linux-2.4.21/arch/mips/sibyte/sb1250/setup.c linux-2.4.22/arch/mips/sibyte/sb1250/setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2000, 2001 Broadcom Corporation
+ * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -16,39 +16,195 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
+#include <linux/kernel.h>
+#include <linux/reboot.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/mipsregs.h>
+#include <asm/io.h>
 #include <asm/sibyte/sb1250.h>
 #include <asm/sibyte/sb1250_regs.h>
 #include <asm/sibyte/sb1250_scd.h>
 #include <asm/sibyte/64bit.h>
 
-/* Setup code likely to be common to all BCM1250 platforms */
+unsigned int sb1_pass;
+unsigned int soc_pass;
+unsigned int soc_type;
+unsigned int periph_rev;
+unsigned int zbbus_mhz;
+
+static char *soc_str;
+static char *pass_str;
+static unsigned int war_pass;	/* XXXKW don't overload PASS defines? */
+
+static inline int setup_bcm1250(void);
+static inline int setup_bcm112x(void);
+
+/* Setup code likely to be common to all SiByte platforms */
+
+static inline int sys_rev_decode(void)
+{
+	int ret = 0;
+
+	war_pass = soc_pass;
+	switch (soc_type) {
+	case K_SYS_SOC_TYPE_BCM1250:
+	case K_SYS_SOC_TYPE_BCM1250_ALT:
+	case K_SYS_SOC_TYPE_BCM1250_ALT2:
+		soc_str = "BCM1250";
+		ret = setup_bcm1250();
+		break;
+	case K_SYS_SOC_TYPE_BCM1120:
+		soc_str = "BCM1120";
+		ret = setup_bcm112x();
+		break;
+	case K_SYS_SOC_TYPE_BCM1125:
+		soc_str = "BCM1125";
+		ret = setup_bcm112x();
+		break;
+	case K_SYS_SOC_TYPE_BCM1125H:
+		soc_str = "BCM1125H";
+		ret = setup_bcm112x();
+		break;
+	default:
+		prom_printf("Unknown SOC type %x\n", soc_type);
+		ret = 1;
+		break;
+	}
+	return ret;
+}
+
+static inline int setup_bcm1250(void)
+{
+	int ret = 0;
+
+	switch (soc_pass) {
+	case K_SYS_REVISION_BCM1250_PASS1:
+		periph_rev = 1;
+		pass_str = "Pass 1";
+		break;
+	case K_SYS_REVISION_BCM1250_A10:
+		periph_rev = 2;
+		pass_str = "A8/A10";
+		/* XXXKW different war_pass? */
+		war_pass = K_SYS_REVISION_BCM1250_PASS2;
+		break;
+	case K_SYS_REVISION_BCM1250_PASS2_2:
+		periph_rev = 2;
+		pass_str = "B1";
+		break;
+	case K_SYS_REVISION_BCM1250_B2:
+		periph_rev = 2;
+		pass_str = "B2";
+		war_pass = K_SYS_REVISION_BCM1250_PASS2_2;
+		break;
+	case K_SYS_REVISION_BCM1250_PASS3:
+		periph_rev = 3;
+		pass_str = "C0";
+		break;
+	case K_SYS_REVISION_BCM1250_C1:
+		periph_rev = 3;
+		pass_str = "C1";
+		break;
+	default:
+		if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) {
+			periph_rev = 2;
+			pass_str = "A0-A6";
+			war_pass = K_SYS_REVISION_BCM1250_PASS2;
+		} else {
+			prom_printf("Unknown BCM1250 rev %x\n", soc_pass);
+			ret = 1;
+		}
+		break;
+	}
+	return ret;
+}
+
+static inline int setup_bcm112x(void)
+{
+	int ret = 0;
 
-unsigned int sb1250_pass;
+	switch (soc_pass) {
+	case 0:
+		/* Early build didn't have revid set */
+		periph_rev = 3;
+		pass_str = "A1";
+		war_pass = K_SYS_REVISION_BCM112x_A1;
+		break;
+	case K_SYS_REVISION_BCM112x_A1:
+		periph_rev = 3;
+		pass_str = "A1";
+		break;
+	case K_SYS_REVISION_BCM112x_A2:
+		periph_rev = 3;
+		pass_str = "A2";
+		break;
+	default:
+		prom_printf("Unknown %s rev %x\n", soc_str, soc_pass);
+		ret = 1;
+	}
+	return ret;
+}
 
 void sb1250_setup(void)
 {
+	uint64_t sys_rev;
+	int plldiv;
 	int bad_config = 0;
 
-	sb1250_pass = G_SYS_REVISION(in64(IO_SPACE_BASE | A_SCD_SYSTEM_REVISION));
-	/* sb1250_pass is more specific than "1", "2" etc.  There are
-           many revision numbers corresponding to "Pass 2". */
-	switch(sb1250_pass) {
-	case 1:
+	sb1_pass = read_c0_prid() & 0xff;
+	sys_rev = in64(IO_SPACE_BASE | A_SCD_SYSTEM_REVISION);
+	soc_type = SYS_SOC_TYPE(sys_rev);
+	soc_pass = G_SYS_REVISION(sys_rev);
+
+	if (sys_rev_decode()) {
+		prom_printf("Restart after failure to identify SiByte chip\n");
+		machine_restart(NULL);
+	}
+
+	plldiv = G_SYS_PLL_DIV(in64(IO_SPACE_BASE | A_SCD_SYSTEM_CFG));
+	zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
 #ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
-		printk("@@@@ This is a pass 1 board, and the kernel doesn't have the proper workarounds compiled in. @@@@");
+	out64(0, KSEG1 + A_SCD_ZBBUS_CYCLE_COUNT);
+#endif
+
+	prom_printf("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n",
+		    soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
+	prom_printf("Board type: %s\n", get_system_type());
+
+	switch(war_pass) {
+	case K_SYS_REVISION_BCM1250_PASS1:
+#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
+		prom_printf("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, and the kernel doesn't have the proper workarounds compiled in. @@@@\n");
 		bad_config = 1;
 #endif
 		break;
-	default:
-#if defined(CONFIG_CPU_HAS_PREFETCH) || !defined(CONFIG_SB1_PASS_2_WORKAROUNDS)
-		printk("@@@@ This is a pass 2 board, and the kernel doesn't have the proper workarounds compiled in. @@@@");
-		printk("@@@@ Prefetches are enabled in this kernel, but are buggy on this board.  @@@@");
+	case K_SYS_REVISION_BCM1250_PASS2:
+		/* Pass 2 - easiest as default for now - so many numbers */
+#if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) || !defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS)
+		prom_printf("@@@@ This is a BCM1250 A3-A10 board, and the kernel doesn't have the proper workarounds compiled in. @@@@\n");
+		bad_config = 1;
+#endif
+#ifdef CONFIG_CPU_HAS_PREFETCH
+		prom_printf("@@@@ Prefetches may be enabled in this kernel, but are buggy on this board.  @@@@\n");
 		bad_config = 1;
 #endif
 		break;
+	case K_SYS_REVISION_BCM1250_PASS2_2:
+#ifndef CONFIG_SB1_PASS_2_WORKAROUNDS
+		prom_printf("@@@@ This is a BCM1250 B1/B2. board, and the kernel doesn't have the proper workarounds compiled in. @@@@\n");
+		bad_config = 1;
+#endif
+#if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) || !defined(CONFIG_CPU_HAS_PREFETCH)
+		prom_printf("@@@@ This is a BCM1250 B1/B2, but the kernel is conservatively configured for an 'A' stepping. @@@@\n");
+#endif
+		break;
+	default:
+		break;
 	}
-	/* XXXKW this is too early for panic/printk to actually do much! */
 	if (bad_config) {
-		panic("Invalid configuration for this pass.");
+		prom_printf("Invalid configuration for this chip.\n");
+		machine_restart(NULL);
 	}
 }