MIPS: Alchemy: Single kernel for DB1200/1300/1550
Combine support for the DB1200/PB1200, DB1300 and DB1550 boards into
a single kernel image.
defconfig-generated image verified on DB1200, DB1300 and DB1550.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4335/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/alchemy/devboards/Makefile b/arch/mips/alchemy/devboards/Makefile
index c9e747d..f8a9624 100644
--- a/arch/mips/alchemy/devboards/Makefile
+++ b/arch/mips/alchemy/devboards/Makefile
@@ -8,6 +8,4 @@
obj-$(CONFIG_MIPS_PB1500) += pb1500.o
obj-$(CONFIG_MIPS_PB1550) += pb1550.o
obj-$(CONFIG_MIPS_DB1000) += db1000.o
-obj-$(CONFIG_MIPS_DB1200) += db1200.o
-obj-$(CONFIG_MIPS_DB1300) += db1300.o
-obj-$(CONFIG_MIPS_DB1550) += db1550.o
+obj-$(CONFIG_MIPS_DB1235) += db1235.o db1200.o db1300.o db1550.o
diff --git a/arch/mips/alchemy/devboards/db1200.c b/arch/mips/alchemy/devboards/db1200.c
index bf22484..299b7d2 100644
--- a/arch/mips/alchemy/devboards/db1200.c
+++ b/arch/mips/alchemy/devboards/db1200.c
@@ -45,25 +45,9 @@
#include "platform.h"
-static const char *board_type_str(void)
-{
- switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
- case BCSR_WHOAMI_PB1200_DDR1:
- case BCSR_WHOAMI_PB1200_DDR2:
- return "PB1200";
- case BCSR_WHOAMI_DB1200:
- return "DB1200";
- default:
- return "(unknown)";
- }
-}
+const char *get_system_type(void);
-const char *get_system_type(void)
-{
- return board_type_str();
-}
-
-static int __init detect_board(void)
+static int __init db1200_detect_board(void)
{
int bid;
@@ -96,19 +80,17 @@
return 1; /* it's neither */
}
-void __init board_setup(void)
+int __init db1200_board_setup(void)
{
unsigned long freq0, clksrc, div, pfc;
unsigned short whoami;
- if (detect_board()) {
- printk(KERN_ERR "NOT running on a DB1200/PB1200 board!\n");
- return;
- }
+ if (db1200_detect_board())
+ return -ENODEV;
whoami = bcsr_read(BCSR_WHOAMI);
printk(KERN_INFO "Alchemy/AMD/RMI %s Board, CPLD Rev %d"
- " Board-ID %d Daughtercard ID %d\n", board_type_str(),
+ " Board-ID %d Daughtercard ID %d\n", get_system_type(),
(whoami >> 4) & 0xf, (whoami >> 8) & 0xf, whoami & 0xf);
/* SMBus/SPI on PSC0, Audio on PSC1 */
@@ -138,6 +120,8 @@
clksrc = SYS_CS_MUX_FQ0 << SYS_CS_ME0_BIT;
__raw_writel(clksrc, (void __iomem *)SYS_CLKSRC);
wmb();
+
+ return 0;
}
/******************************************************************************/
@@ -796,7 +780,7 @@
return 0;
}
-static int __init db1200_dev_init(void)
+int __init db1200_dev_setup(void)
{
unsigned long pfc;
unsigned short sw;
@@ -846,7 +830,7 @@
gpio_request(215, "otg-vbus");
gpio_direction_output(215, 1);
- printk(KERN_INFO "%s device configuration:\n", board_type_str());
+ printk(KERN_INFO "%s device configuration:\n", get_system_type());
sw = bcsr_read(BCSR_SWITCHES);
if (sw & BCSR_SWITCHES_DIP_8) {
@@ -922,4 +906,3 @@
return 0;
}
-device_initcall(db1200_dev_init);
diff --git a/arch/mips/alchemy/devboards/db1235.c b/arch/mips/alchemy/devboards/db1235.c
new file mode 100644
index 0000000..15003eb
--- /dev/null
+++ b/arch/mips/alchemy/devboards/db1235.c
@@ -0,0 +1,84 @@
+/*
+ * DB1200/PB1200 / DB1550 / DB1300 board support.
+ *
+ * These 4 boards can reliably be supported in a single kernel image.
+ */
+
+#include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-db1x00/bcsr.h>
+
+int __init db1200_board_setup(void);
+int __init db1200_dev_setup(void);
+int __init db1300_board_setup(void);
+int __init db1300_dev_setup(void);
+int __init db1550_board_setup(void);
+int __init db1550_dev_setup(void);
+int __init db1550_pci_setup(void);
+
+static const char *board_type_str(void)
+{
+ switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
+ case BCSR_WHOAMI_PB1200_DDR1:
+ case BCSR_WHOAMI_PB1200_DDR2:
+ return "PB1200";
+ case BCSR_WHOAMI_DB1200:
+ return "DB1200";
+ case BCSR_WHOAMI_DB1300:
+ return "DB1300";
+ case BCSR_WHOAMI_DB1550:
+ return "DB1550";
+ default:
+ return "(unknown)";
+ }
+}
+
+const char *get_system_type(void)
+{
+ return board_type_str();
+}
+
+void __init board_setup(void)
+{
+ int ret;
+
+ switch (alchemy_get_cputype()) {
+ case ALCHEMY_CPU_AU1550:
+ ret = db1550_board_setup();
+ break;
+ case ALCHEMY_CPU_AU1200:
+ ret = db1200_board_setup();
+ break;
+ case ALCHEMY_CPU_AU1300:
+ ret = db1300_board_setup();
+ break;
+ default:
+ pr_err("unsupported CPU on board\n");
+ ret = -ENODEV;
+ }
+ if (ret)
+ panic("cannot initialize board support\n");
+}
+
+int __init db1235_arch_init(void)
+{
+ if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1550)
+ return db1550_pci_setup();
+ return 0;
+}
+arch_initcall(db1235_arch_init);
+
+int __init db1235_dev_init(void)
+{
+ switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
+ case BCSR_WHOAMI_PB1200_DDR1:
+ case BCSR_WHOAMI_PB1200_DDR2:
+ case BCSR_WHOAMI_DB1200:
+ return db1200_dev_setup();
+ case BCSR_WHOAMI_DB1300:
+ return db1300_dev_setup();
+ case BCSR_WHOAMI_DB1550:
+ return db1550_dev_setup();
+ }
+ return 0;
+}
+device_initcall(db1235_dev_init);
diff --git a/arch/mips/alchemy/devboards/db1300.c b/arch/mips/alchemy/devboards/db1300.c
index c56e024..cdf37cb 100644
--- a/arch/mips/alchemy/devboards/db1300.c
+++ b/arch/mips/alchemy/devboards/db1300.c
@@ -110,11 +110,6 @@
au1300_set_dbdma_gpio(1, AU1300_PIN_FG3AUX);
}
-char *get_system_type(void)
-{
- return "DB1300";
-}
-
/**********************************************************************/
static void au1300_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
@@ -701,7 +696,7 @@
&db1300_sndi2s_dev,
};
-static int __init db1300_device_init(void)
+int __init db1300_dev_setup(void)
{
int swapped, cpldirq;
@@ -758,10 +753,9 @@
return platform_add_devices(db1300_dev, ARRAY_SIZE(db1300_dev));
}
-device_initcall(db1300_device_init);
-void __init board_setup(void)
+int __init db1300_board_setup(void)
{
unsigned short whoami;
@@ -779,4 +773,6 @@
alchemy_uart_enable(AU1300_UART0_PHYS_ADDR);
alchemy_uart_enable(AU1300_UART1_PHYS_ADDR);
alchemy_uart_enable(AU1300_UART3_PHYS_ADDR);
+
+ return 0;
}
diff --git a/arch/mips/alchemy/devboards/db1550.c b/arch/mips/alchemy/devboards/db1550.c
index 9eb7906..7664beed 100644
--- a/arch/mips/alchemy/devboards/db1550.c
+++ b/arch/mips/alchemy/devboards/db1550.c
@@ -26,12 +26,6 @@
#include <prom.h>
#include "platform.h"
-
-const char *get_system_type(void)
-{
- return "DB1550";
-}
-
static void __init db1550_hw_setup(void)
{
void __iomem *base;
@@ -61,7 +55,7 @@
alchemy_gpio_direction_output(202, 0); /* green led on */
}
-void __init board_setup(void)
+int __init db1550_board_setup(void)
{
unsigned short whoami;
@@ -74,6 +68,7 @@
(whoami >> 4) & 0xf, (whoami >> 8) & 0xf, whoami & 0xf);
db1550_hw_setup();
+ return 0;
}
/*****************************************************************************/
@@ -430,13 +425,12 @@
};
/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
-static int __init db1550_pci_init(void)
+int __init db1550_pci_setup(void)
{
return platform_device_register(&db1550_pci_host_dev);
}
-arch_initcall(db1550_pci_init);
-static int __init db1550_dev_init(void)
+int __init db1550_dev_setup(void)
{
int swapped;
@@ -492,4 +486,3 @@
return platform_add_devices(db1550_devs, ARRAY_SIZE(db1550_devs));
}
-device_initcall(db1550_dev_init);
diff --git a/arch/mips/alchemy/devboards/platform.c b/arch/mips/alchemy/devboards/platform.c
index f39042e..8df86eb 100644
--- a/arch/mips/alchemy/devboards/platform.c
+++ b/arch/mips/alchemy/devboards/platform.c
@@ -36,11 +36,10 @@
void prom_putchar(unsigned char c)
{
-#ifdef CONFIG_MIPS_DB1300
- alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
-#else
- alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
-#endif
+ if (alchemy_get_cputype() == ALCHEMY_CPU_AU1300)
+ alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
+ else
+ alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
}