MIPS: Alchemy: Extended DB1200 board support.

Create own directory for DB1200 code and update it with new features.

- SPI support:
  - tmp121 temperature sensor
  - SPI flash on DB1200
- I2C support
  - NE1619 sensor
  - AT24 eeprom
- I2C/SPI can be selected at boot time via switch S6.8
- Carddetect IRQs for SD cards.
- gen_nand based NAND support.
- hexleds count sleep/wake transitions.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/alchemy/common/reset.c

@@ -164,9 +164,6 @@ void au1000_halt(void)
 #ifdef CONFIG_MIPS_MIRAGE
 	gpio_direction_output(210, 1);
 #endif
-#ifdef CONFIG_MIPS_DB1200
-	au_writew(au_readw(0xB980001C) | (1 << 14), 0xB980001C);
-#endif
 #ifdef CONFIG_PM
 	au_sleep();
 

arch/mips/alchemy/devboards/Makefile

@@ -11,7 +11,7 @@ obj-$(CONFIG_MIPS_PB1500)	+= pb1500/
 obj-$(CONFIG_MIPS_PB1550)	+= pb1550/
 obj-$(CONFIG_MIPS_DB1000)	+= db1x00/
 obj-$(CONFIG_MIPS_DB1100)	+= db1x00/
-obj-$(CONFIG_MIPS_DB1200)	+= pb1200/
+obj-$(CONFIG_MIPS_DB1200)	+= db1200/
 obj-$(CONFIG_MIPS_DB1500)	+= db1x00/
 obj-$(CONFIG_MIPS_DB1550)	+= db1x00/
 obj-$(CONFIG_MIPS_BOSPORUS)	+= db1x00/

arch/mips/alchemy/devboards/db1200/Makefile

+obj-y += setup.o platform.o

arch/mips/alchemy/devboards/db1200/setup.c

+/*
+ * Alchemy/AMD/RMI DB1200 board setup.
+ *
+ * Licensed under the terms outlined in the file COPYING in the root of
+ * this source archive.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/pm.h>
+#include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-db1x00/bcsr.h>
+#include <asm/mach-db1x00/db1200.h>
+#include <asm/processor.h>
+#include <asm/reboot.h>
+
+const char *get_system_type(void)
+{
+	return "Alchemy Db1200";
+}
+
+static void board_power_off(void)
+{
+	bcsr_write(BCSR_RESETS, 0);
+	bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET);
+}
+
+void board_reset(void)
+{
+	bcsr_write(BCSR_RESETS, 0);
+	bcsr_write(BCSR_SYSTEM, 0);
+}
+
+void __init board_setup(void)
+{
+	unsigned long freq0, clksrc, div, pfc;
+	unsigned short whoami;
+
+	bcsr_init(DB1200_BCSR_PHYS_ADDR,
+		  DB1200_BCSR_PHYS_ADDR + DB1200_BCSR_HEXLED_OFS);
+
+	whoami = bcsr_read(BCSR_WHOAMI);
+	printk(KERN_INFO "Alchemy/AMD/RMI DB1200 Board, CPLD Rev %d"
+		"  Board-ID %d  Daughtercard ID %d\n",
+		(whoami >> 4) & 0xf, (whoami >> 8) & 0xf, whoami & 0xf);
+
+	/* SMBus/SPI on PSC0, Audio on PSC1 */
+	pfc = __raw_readl((void __iomem *)SYS_PINFUNC);
+	pfc &= ~(SYS_PINFUNC_P0A | SYS_PINFUNC_P0B);
+	pfc &= ~(SYS_PINFUNC_P1A | SYS_PINFUNC_P1B | SYS_PINFUNC_FS3);
+	pfc |= SYS_PINFUNC_P1C;	/* SPI is configured later */
+	__raw_writel(pfc, (void __iomem *)SYS_PINFUNC);
+	wmb();
+
+	/* Clock configurations: PSC0: ~50MHz via Clkgen0, derived from
+	 * CPU clock; all other clock generators off/unused.
+	 */
+	div = (get_au1x00_speed() + 25000000) / 50000000;
+	if (div & 1)
+		div++;
+	div = ((div >> 1) - 1) & 0xff;
+
+	freq0 = div << SYS_FC_FRDIV0_BIT;
+	__raw_writel(freq0, (void __iomem *)SYS_FREQCTRL0);
+	wmb();
+	freq0 |= SYS_FC_FE0;	/* enable F0 */
+	__raw_writel(freq0, (void __iomem *)SYS_FREQCTRL0);
+	wmb();
+
+	/* psc0_intclk comes 1:1 from F0 */
+	clksrc = SYS_CS_MUX_FQ0 << SYS_CS_ME0_BIT;
+	__raw_writel(clksrc, (void __iomem *)SYS_CLKSRC);
+	wmb();
+
+	pm_power_off = board_power_off;
+	_machine_halt = board_power_off;
+	_machine_restart = (void(*)(char *))board_reset;
+}
+
+/* use the hexleds to count the number of times the cpu has entered
+ * wait, the dots to indicate whether the CPU is currently idle or
+ * active (dots off = sleeping, dots on = working) for cases where
+ * the number doesn't change for a long(er) period of time.
+ */
+static void db1200_wait(void)
+{
+	__asm__("	.set	push			\n"
+		"	.set	mips3			\n"
+		"	.set	noreorder		\n"
+		"	cache	0x14, 0(%0)		\n"
+		"	cache	0x14, 32(%0)		\n"
+		"	cache	0x14, 64(%0)		\n"
+		/* dots off: we're about to call wait */
+		"	lui	$26, 0xb980		\n"
+		"	ori	$27, $0, 3		\n"
+		"	sb	$27, 0x18($26)		\n"
+		"	sync				\n"
+		"	nop				\n"
+		"	wait				\n"
+		"	nop				\n"
+		"	nop				\n"
+		"	nop				\n"
+		"	nop				\n"
+		"	nop				\n"
+		/* dots on: there's work to do, increment cntr */
+		"	lui	$26, 0xb980		\n"
+		"	sb	$0, 0x18($26)		\n"
+		"	lui	$26, 0xb9c0		\n"
+		"	lb	$27, 0($26)		\n"
+		"	addiu	$27, $27, 1		\n"
+		"	sb	$27, 0($26)		\n"
+		"	sync				\n"
+		"	.set	pop			\n"
+		: : "r" (db1200_wait));
+}
+
+static int __init db1200_arch_init(void)
+{
+	/* GPIO7 is low-level triggered CPLD cascade */
+	set_irq_type(AU1200_GPIO7_INT, IRQF_TRIGGER_LOW);
+	bcsr_init_irq(DB1200_INT_BEGIN, DB1200_INT_END, AU1200_GPIO7_INT);
+
+	/* do not autoenable these: CPLD has broken edge int handling,
+	 * and the CD handler setup requires manual enabling to work
+	 * around that.
+	 */
+	irq_to_desc(DB1200_SD0_INSERT_INT)->status |= IRQ_NOAUTOEN;
+	irq_to_desc(DB1200_SD0_EJECT_INT)->status |= IRQ_NOAUTOEN;
+
+	if (cpu_wait)
+		cpu_wait = db1200_wait;
+
+	return 0;
+}
+arch_initcall(db1200_arch_init);

arch/mips/alchemy/devboards/pb1200/board_setup.c

@@ -58,16 +58,9 @@ void __init board_setup(void)
 {
 	char *argptr;
 
-#ifdef CONFIG_MIPS_PB1200
 	printk(KERN_INFO "AMD Alchemy Pb1200 Board\n");
 	bcsr_init(PB1200_BCSR_PHYS_ADDR,
 		  PB1200_BCSR_PHYS_ADDR + PB1200_BCSR_HEXLED_OFS);
-#endif
-#ifdef CONFIG_MIPS_DB1200
-	printk(KERN_INFO "AMD Alchemy Db1200 Board\n");
-	bcsr_init(DB1200_BCSR_PHYS_ADDR,
-		  DB1200_BCSR_PHYS_ADDR + DB1200_BCSR_HEXLED_OFS);
-#endif
 
 	argptr = prom_getcmdline();
 #ifdef CONFIG_SERIAL_8250_CONSOLE
@@ -149,7 +142,6 @@ void __init board_setup(void)
 
 static int __init pb1200_init_irq(void)
 {
-#ifdef CONFIG_MIPS_PB1200
 	/* We have a problem with CPLD rev 3. */
 	if (BCSR_WHOAMI_CPLD(bcsr_read(BCSR_WHOAMI)) <= 3) {
 		printk(KERN_ERR "WARNING!!!\n");
@@ -169,7 +161,6 @@ static int __init pb1200_init_irq(void)
 		printk(KERN_ERR "WARNING!!!\n");
 		panic("Game over.  Your score is 0.");
 	}
-#endif
 
 	set_irq_type(AU1200_GPIO7_INT, IRQF_TRIGGER_LOW);
 	bcsr_init_irq(PB1200_INT_BEGIN, PB1200_INT_END, AU1200_GPIO7_INT);

arch/mips/alchemy/devboards/pb1200/platform.c

@@ -68,7 +68,6 @@ static struct led_classdev pb1200mmc_led = {
 	.brightness_set	= pb1200_mmcled_set,
 };
 
-#ifndef CONFIG_MIPS_DB1200
 static void pb1200mmc1_set_power(void *mmc_host, int state)
 {
 	if (state)
@@ -88,7 +87,6 @@ static int pb1200mmc1_card_inserted(void *mmc_host)
 {
 	return (bcsr_read(BCSR_SIGSTAT) & BCSR_INT_SD1INSERT) ? 1 : 0;
 }
-#endif
 
 const struct au1xmmc_platform_data au1xmmc_platdata[2] = {
 	[0] = {
@@ -98,7 +96,6 @@ const struct au1xmmc_platform_data au1xmmc_platdata[2] = {
 		.cd_setup	= NULL,		/* use poll-timer in driver */
 		.led		= &pb1200mmc_led,
 	},
-#ifndef CONFIG_MIPS_DB1200
 	[1] = {
 		.set_power	= pb1200mmc1_set_power,
 		.card_inserted	= pb1200mmc1_card_inserted,
@@ -106,7 +103,6 @@ const struct au1xmmc_platform_data au1xmmc_platdata[2] = {
 		.cd_setup	= NULL,		/* use poll-timer in driver */
 		.led		= &pb1200mmc_led,
 	},
-#endif
 };
 
 static struct resource ide_resources[] = {
@@ -174,7 +170,6 @@ static int __init board_register_devices(void)
 {
 	int swapped;
 
-#ifdef CONFIG_MIPS_PB1200
 	db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS,
 				    PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1,
 				    PCMCIA_MEM_PSEUDO_PHYS,
@@ -198,38 +193,9 @@ static int __init board_register_devices(void)
 				    /*PB1200_PC1_STSCHG_INT*/0,
 				    PB1200_PC1_EJECT_INT,
 				    1);
-#else
-	db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS,
-				    PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1,
-				    PCMCIA_MEM_PSEUDO_PHYS,
-				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00040000 - 1,
-				    PCMCIA_IO_PSEUDO_PHYS,
-				    PCMCIA_IO_PSEUDO_PHYS   + 0x00001000 - 1,
-				    DB1200_PC0_INT,
-				    DB1200_PC0_INSERT_INT,
-				    /*DB1200_PC0_STSCHG_INT*/0,
-				    DB1200_PC0_EJECT_INT,
-				    0);
-
-	db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS + 0x00400000,
-				    PCMCIA_ATTR_PSEUDO_PHYS + 0x00440000 - 1,
-				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00400000,
-				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00440000 - 1,
-				    PCMCIA_IO_PSEUDO_PHYS   + 0x00400000,
-				    PCMCIA_IO_PSEUDO_PHYS   + 0x00401000 - 1,
-				    DB1200_PC1_INT,
-				    DB1200_PC1_INSERT_INT,
-				    /*DB1200_PC1_STSCHG_INT*/0,
-				    DB1200_PC1_EJECT_INT,
-				    1);
-#endif
 
 	swapped = bcsr_read(BCSR_STATUS) &  BCSR_STATUS_DB1200_SWAPBOOT;
-#ifdef CONFIG_MIPS_PB1200
 	db1x_register_norflash(128 * 1024 * 1024, 2, swapped);
-#else
-	db1x_register_norflash(64 * 1024 * 1024, 2, swapped);
-#endif
 
 	return platform_add_devices(board_platform_devices,
 				    ARRAY_SIZE(board_platform_devices));

arch/mips/include/asm/mach-db1x00/db1200.h

@@ -28,24 +28,6 @@
 #include <asm/mach-au1x00/au1000.h>
 #include <asm/mach-au1x00/au1xxx_psc.h>
 
-#define DBDMA_AC97_TX_CHAN	DSCR_CMD0_PSC1_TX
-#define DBDMA_AC97_RX_CHAN	DSCR_CMD0_PSC1_RX
-#define DBDMA_I2S_TX_CHAN	DSCR_CMD0_PSC1_TX
-#define DBDMA_I2S_RX_CHAN	DSCR_CMD0_PSC1_RX
-
-/*
- * SPI and SMB are muxed on the DBAu1200 board.
- * Refer to board documentation.
- */
-#define SPI_PSC_BASE		PSC0_BASE_ADDR
-#define SMBUS_PSC_BASE		PSC0_BASE_ADDR
-/*
- * AC'97 and I2S are muxed on the DBAu1200 board.
- * Refer to board documentation.
- */
-#define AC97_PSC_BASE		PSC1_BASE_ADDR
-#define I2S_PSC_BASE		PSC1_BASE_ADDR
-
 /* Bit positions for the different interrupt sources */
 #define BCSR_INT_IDE		0x0001
 #define BCSR_INT_ETH		0x0002
@@ -62,17 +44,15 @@
 #define BCSR_INT_SD0INSERT	0x1000
 #define BCSR_INT_SD0EJECT	0x2000
 
-#define SMC91C111_PHYS_ADDR	0x19000300
-#define SMC91C111_INT		DB1200_ETH_INT
-
 #define IDE_PHYS_ADDR		0x18800000
 #define IDE_REG_SHIFT		5
-#define IDE_PHYS_LEN		(16 << IDE_REG_SHIFT)
-#define IDE_INT 		DB1200_IDE_INT
 #define IDE_DDMA_REQ		DSCR_CMD0_DMA_REQ1
 #define IDE_RQSIZE		128
 
-#define NAND_PHYS_ADDR		0x20000000
+#define DB1200_IDE_PHYS_ADDR	IDE_PHYS_ADDR
+#define DB1200_IDE_PHYS_LEN	(16 << IDE_REG_SHIFT)
+#define DB1200_ETH_PHYS_ADDR	0x19000300
+#define DB1200_NAND_PHYS_ADDR	0x20000000
 
 /*
  * External Interrupts for DBAu1200 as of 8/6/2004.
@@ -82,7 +62,7 @@
  *   Example: IDE bis pos is  = 64 - 64
  *            ETH bit pos is  = 65 - 64
  */
-enum external_pb1200_ints {
+enum external_db1200_ints {
 	DB1200_INT_BEGIN	= AU1000_MAX_INTR + 1,
 
 	DB1200_IDE_INT		= DB1200_INT_BEGIN,
@@ -103,7 +83,4 @@ enum external_pb1200_ints {
 	DB1200_INT_END		= DB1200_INT_BEGIN + 15,
 };
 
-/* NAND chip select */
-#define NAND_CS 1
-
 #endif /* __ASM_DB1200_H */