[brcm63xx] prepare for SPI controller driver

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14755 3c298f89-4303-0410-b956-a3cf2f4a3e73

5 files changed, 252 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/cpu.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/cpu.c
index c147e2831..b69821cc6 100644
--- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/cpu.c
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/cpu.c
@@ -4,6 +4,7 @@
  * for more details.
  *
  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ *		 2009 Florian Fainelli <florian@openwrt.org>
  */
 
 #include <linux/kernel.h>
@@ -20,6 +21,9 @@ EXPORT_SYMBOL(bcm63xx_regs_base);
 const int *bcm63xx_irqs;
 EXPORT_SYMBOL(bcm63xx_irqs);
 
+const unsigned long *bcm63xx_regs_spi;
+EXPORT_SYMBOL(bcm63xx_regs_spi);
+
 static u16 bcm63xx_cpu_id;
 static u16 bcm63xx_cpu_rev;
 static unsigned int bcm63xx_cpu_freq;
@@ -49,6 +53,21 @@ static const int bcm96338_irqs[] = {
 	[IRQ_ENET0_TXDMA]	= BCM_6338_ENET0_TXDMA_IRQ,
 };
 
+static const unsigned long bcm96338_regs_spi[] = {
+	[SPI_CMD]		= SPI_BCM_6338_SPI_CMD,
+	[SPI_INT_STATUS]	= SPI_BCM_6338_SPI_INT_STATUS,
+	[SPI_INT_MASK_ST]	= SPI_BCM_6338_SPI_MASK_INT_ST,
+	[SPI_INT_MASK]		= SPI_BCM_6338_SPI_INT_MASK,
+	[SPI_ST]		= SPI_BCM_6338_SPI_ST,
+	[SPI_CLK_CFG]		= SPI_BCM_6338_SPI_CLK_CFG,
+	[SPI_FILL_BYTE]		= SPI_BCM_6338_SPI_FILL_BYTE,
+	[SPI_MSG_TAIL]		= SPI_BCM_6338_SPI_MSG_TAIL,
+	[SPI_RX_TAIL]		= SPI_BCM_6338_SPI_RX_TAIL,
+	[SPI_MSG_CTL]		= SPI_BCM_6338_SPI_MSG_CTL,
+	[SPI_MSG_DATA]		= SPI_BCM_6338_SPI_MSG_DATA,
+	[SPI_RX_DATA]		= SPI_BCM_6338_SPI_RX_DATA,
+};
+
 /*
  * 6348 register sets and irqs
  */
@@ -90,6 +109,21 @@ static const int bcm96348_irqs[] = {
 	[IRQ_PCI]		= BCM_6348_PCI_IRQ,
 };
 
+static const unsigned long bcm96348_regs_spi[] = {
+	[SPI_CMD]		= SPI_BCM_6348_SPI_CMD,
+	[SPI_INT_STATUS]	= SPI_BCM_6348_SPI_INT_STATUS,
+	[SPI_INT_MASK_ST]	= SPI_BCM_6348_SPI_MASK_INT_ST,
+	[SPI_INT_MASK]		= SPI_BCM_6348_SPI_INT_MASK,
+	[SPI_ST]		= SPI_BCM_6348_SPI_ST,
+	[SPI_CLK_CFG]		= SPI_BCM_6348_SPI_CLK_CFG,
+	[SPI_FILL_BYTE]		= SPI_BCM_6348_SPI_FILL_BYTE,
+	[SPI_MSG_TAIL]		= SPI_BCM_6348_SPI_MSG_TAIL,
+	[SPI_RX_TAIL]		= SPI_BCM_6348_SPI_RX_TAIL,
+	[SPI_MSG_CTL]		= SPI_BCM_6348_SPI_MSG_CTL,
+	[SPI_MSG_DATA]		= SPI_BCM_6348_SPI_MSG_DATA,
+	[SPI_RX_DATA]		= SPI_BCM_6348_SPI_RX_DATA,
+};
+
 /*
  * 6358 register sets and irqs
  */
@@ -133,6 +167,21 @@ static const int bcm96358_irqs[] = {
 	[IRQ_PCI]		= BCM_6358_PCI_IRQ,
 };
 
+static const unsigned long bcm96358_regs_spi[] = {
+	[SPI_CMD]		= SPI_BCM_6358_SPI_CMD,
+	[SPI_INT_STATUS]	= SPI_BCM_6358_SPI_INT_STATUS,
+	[SPI_INT_MASK_ST]	= SPI_BCM_6358_SPI_MASK_INT_ST,
+	[SPI_INT_MASK]		= SPI_BCM_6358_SPI_INT_MASK,
+	[SPI_ST]		= SPI_BCM_6358_SPI_STATUS,
+	[SPI_CLK_CFG]		= SPI_BCM_6358_SPI_CLK_CFG,
+	[SPI_FILL_BYTE]		= SPI_BCM_6358_SPI_FILL_BYTE,
+	[SPI_MSG_TAIL]		= SPI_BCM_6358_SPI_MSG_TAIL,
+	[SPI_RX_TAIL]		= SPI_BCM_6358_SPI_RX_TAIL,
+	[SPI_MSG_CTL]		= SPI_BCM_6358_MSG_CTL,
+	[SPI_MSG_DATA]		= SPI_BCM_6358_SPI_MSG_DATA,
+	[SPI_RX_DATA]		= SPI_BCM_6358_SPI_RX_FIFO,
+};
+
 u16 __bcm63xx_get_cpu_id(void)
 {
 	return bcm63xx_cpu_id;
@@ -236,16 +285,19 @@ void __init bcm63xx_cpu_init(void)
 		expected_cpu_id = BCM6338_CPU_ID;
 		bcm63xx_regs_base = bcm96338_regs_base;
 		bcm63xx_irqs = bcm96338_irqs;
+		bcm63xx_regs_spi = bcm96338_regs_spi;
 		break;
 	case CPU_BCM6348:
 		expected_cpu_id = BCM6348_CPU_ID;
 		bcm63xx_regs_base = bcm96348_regs_base;
 		bcm63xx_irqs = bcm96348_irqs;
+		bcm63xx_regs_spi = bcm96348_regs_spi;
 		break;
 	case CPU_BCM6358:
 		expected_cpu_id = BCM6358_CPU_ID;
 		bcm63xx_regs_base = bcm96358_regs_base;
 		bcm63xx_irqs = bcm96358_irqs;
+		bcm63xx_regs_spi = bcm96358_regs_spi;
 		break;
 	}
 
diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/dev-spi.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/dev-spi.c
new file mode 100644
index 000000000..4aea088d2
--- /dev/null
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/dev-spi.c
@@ -0,0 +1,60 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org> 
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_dev_spi.h>
+
+static struct resource spi_resources[] = {
+	{
+		.start		= -1, /* filled at runtime */
+		.end		= -1, /* filled at runtime */
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= -1, /* filled at runtime */
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct bcm63xx_spi_pdata spi_pdata = {
+	.bus_num		= 0,
+	.num_chipselect		= 4,
+	.speed_hz		= 50000000,	/* Fclk */
+};
+
+static struct platform_device bcm63xx_spi_device = {
+	.name		= "bcm63xx_spi",
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(spi_resources),
+	.resource	= spi_resources,
+	.dev.pdata	= &spi_pdata;
+};
+
+int __init bcm63xx_spi_register(void)
+{
+	spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
+	spi_resources[0].end = spi_resources[0].start;
+	spi_resources[0].end += RSET_SPI_SIZE - 1;
+	spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
+
+	/* Fill in platform data */
+	if (CPU_IS_BCM6338() || CPU_IS_BCM6348()) {
+		spi_pdata.msg_fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
+		spi_pdata.rx_fifo_size = SPI_BCM_6338_SPI_RX_DATA_SIZE;
+	}
+
+	if (CPU_IS_BCM6358()) {
+		spi_pdata.msg_fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
+		spi_pdata.rx_fifo_size =  SPI_BCM_6358_SPI_RX_DATA_SIZE;
+	}
+	
+	return platform_device_register(&bcm63xx_spi_device);
+}
diff --git a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h
index 6fa8825b4..be9da2eee 100644
--- a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h
+++ b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h
@@ -290,6 +290,120 @@ static inline unsigned long bcm63xx_regset_address(enum bcm63xx_regs_set set)
 }
 
 /*
+ * SPI register layout is not compatible
+ * accross CPU versions but it is software
+ * compatible
+ */
+
+enum bcm63xx_regs_spi {
+	SPI_CMD,
+	SPI_INT_STATUS,
+	SPI_INT_MASK_ST,
+	SPI_INT_MASK,
+	SPI_ST,
+	SPI_CLK_CFG,
+	SPI_FILL_BYTE,
+	SPI_MSG_TAIL,
+	SPI_RX_TAIL,
+	SPI_MSG_CTL,
+	SPI_MSG_DATA,
+	SPI_RX_DATA,
+};
+
+extern const unsigned long *bcm63xx_regs_spi;
+
+static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
+{
+#ifdef BCMCPU_RUNTIME_DETECT
+        return bcm63xx_regs_spi[reg];
+#else
+#ifdef CONFIG_BCM63XX_CPU_6338
+switch (reg) {
+	case SPI_CMD:
+		return SPI_BCM_6338_SPI_CMD;
+	case SPI_INT_STATUS:
+		return SPI_BCM_6338_SPI_INT_STATUS;
+	case SPI_INT_MASK_ST:
+		return SPI_BCM_6338_SPI_MASK_INT_ST;
+	case SPI_INT_MASK:
+		return SPI_BCM_6338_SPI_INT_MASK;
+	case SPI_ST:
+		return SPI_BCM_6338_SPI_ST;
+	case SPI_CLK_CFG:
+		return SPI_BCM_6338_SPI_CLK_CFG;
+	case SPI_FILL_BYTE:
+		return SPI_BCM_6338_SPI_FILL_BYTE;
+	case SPI_MSG_TAIL:
+		return SPI_BCM_6338_SPI_MSG_TAIL;
+	case SPI_RX_TAIL:
+		return SPI_BCM_6338_SPI_RX_TAIL;
+	case SPI_MSG_CTL:
+		return SPI_BCM_6338_SPI_MSG_CTL;
+	case SPI_MSG_DATA:
+		return SPI_BCM_6338_SPI_MSG_DATA;
+	case SPI_RX_DATA:
+		return SPI_BCM_6338_SPI_RX_DATA;
+}
+#endif
+#ifdef CONFIG_BCM63XX_CPU_6348
+switch (reg) {
+	case SPI_CMD:
+		return SPI_BCM_6348_SPI_CMD;
+	case SPI_INT_MASK_ST:
+		return SPI_BCM_6348_SPI_MASK_INT_ST;
+	case SPI_INT_STATUS:
+		return SPI_BCM_6348_SPI_INT_STATUS;
+	case SPI_ST:
+		return SPI_BCM_6348_SPI_ST;
+	case SPI_CLK_CFG:
+		return SPI_BCM_6348_SPI_CLK_CFG;
+	case SPI_FILL_BYTE:
+		return SPI_BCM_6348_SPI_FILL_BYTE;
+	case SPI_MSG_TAIL:
+		return SPI_BCM_6348_SPI_MSG_TAIL;
+	case SPI_RX_TAIL:
+		return SPI_BCM_6348_SPI_RX_TAIL;
+	case SPI_MSG_CTL:
+		return SPI_BCM_6348_SPI_MSG_CTL;
+	case SPI_MSG_DATA:
+		return SPI_BCM_6348_SPI_MSG_DATA;
+	case SPI_BCM_6348_SPI_RX_DATA:
+		return SPI_BCM_6348_SPI_RX_DATA;
+}
+#endif
+#ifdef CONFIG_BCM63XX_CPU_6358
+switch (reg) {
+	case SPI_CMD:
+		return SPI_BCM_6358_SPI_CMD;
+	case SPI_INT_STATUS:
+		return SPI_BCM_6358_SPI_INT_STATUS;
+	case SPI_INT_MASK_ST:
+		return SPI_BCM_6358_SPI_MASK_INT_ST;
+	case SPI_INT_MASK:
+		return SPI_BCM_6358_SPI_INT_MASK;
+	case SPI_ST:
+		return SPI_BCM_6358_SPI_STATUS;
+	case SPI_CLK_CFG:
+		return SPI_BCM_6358_SPI_CLK_CFG;
+	case SPI_FILL_BYTE:
+		return SPI_BCM_6358_SPI_FILL_BYTE;
+	case SPI_MSG_TAIL:
+		return SPI_BCM_6358_SPI_MSG_TAIL;
+	case SPI_RX_TAIL:
+		return SPI_BCM_6358_SPI_RX_TAIL;
+	case SPI_MSG_CTL:
+		return SPI_BCM_6358_MSG_CTL;
+	case SPI_MSG_DATA:
+		return SPI_BCM_6358_SPI_MSG_DATA;
+	case SPI_RX_DATA:
+		return SPI_BCM_6358_SPI_RX_FIFO;
+}
+#endif
+#endif
+	return 0;
+}
+
+/*
  * IRQ number changes across CPU too
  */
 enum bcm63xx_irq {
diff --git a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_dev_spi.h b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_dev_spi.h
new file mode 100644
index 000000000..bd47676a4
--- /dev/null
+++ b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_dev_spi.h
@@ -0,0 +1,16 @@
+#ifndef BCM63XX_DEV_SPI_H
+#define BCM63XX_DEV_SPI_H
+
+#include <linux/types.h>
+
+int bcm63xx_spi_register(void);
+
+struct bcm63xx_spi_pdata {
+	unsigned int	msg_fifo_size;
+	unsigned int	rx_fifo_size;
+	int		bus_num;
+	int		num_chipselect;
+	u32		speed_hz;
+};
+
+#endif /* BCM63XX_DEV_SPI_H */
diff --git a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_io.h b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_io.h
index 1aef06f1f..af9861115 100644
--- a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_io.h
+++ b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_io.h
@@ -65,6 +65,12 @@
 					bcm63xx_regset_address(s) + (o))
 #define bcm_rset_writel(s,v,o)	bcm_writel((v), \
 					bcm63xx_regset_address(s) + (o))
+#define bcm_reg_spi_readb(s,o)	bcm_readb(bcm63xx_spireg(s) + (o))
+#define bcm_reg_spi_readw(s,o)	bcm_readw(bcm63xx_spireg(s) + (o))
+#define bcm_reg_spi_writeb(s,v,o)	bcm_writeb((v), \
+					bcm63xx_spireg(s) + (o))
+#define bcm_reg_spi_writew(s,v,o)	bcm_writew((v), \
+					bcm63xx_spireg(s) + (o))
 
 /*
  * helpers for frequently used register sets
@@ -89,5 +95,9 @@
 #define bcm_memc_writel(v,o)	bcm_rset_writel(RSET_MEMC, (v), (o))
 #define bcm_ddr_readl(o)	bcm_rset_readl(RSET_DDR, (o))
 #define bcm_ddr_writel(v,o)	bcm_rset_writel(RSET_DDR, (v), (o))
+#define bcm_spi_readb(o)	bcm_reg_spi_readb(RSET_SPI, (o))
+#define bcm_spi_readw(o)	bcm_reg_spi_readw(RSET_SPI, (o))
+#define bcm_spi_writeb(v,o)	bcm_reg_spi_writeb(RSET_SPI, (v), (o))
+#define bcm_spi_writew(v,o)	bcm_reg_spi_writew(RSET_SPI, (v), (o))
 
 #endif /* ! BCM63XX_IO_H_ */