This patch adds the necessary stub to register the SPI platform driver.
Since the registers are shuffled between the 4 BCM63xx CPUs supported by
this SPI driver we also need to generate the internal register layout and
export this layout for the driver to use it properly.
Signed-off-by: Florian Fainelli <florian@xxxxxxxxxxx>
---
Changes since v2:
- added different resource size due to different fifo sizes
No changes in v1
arch/mips/bcm63xx/Makefile | 3 +-
arch/mips/bcm63xx/dev-spi.c | 119 ++++++++++++++++++++
.../include/asm/mach-bcm63xx/bcm63xx_dev_spi.h | 89 +++++++++++++++
3 files changed, 210 insertions(+), 1 deletions(-)
create mode 100644 arch/mips/bcm63xx/dev-spi.c
create mode 100644 arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
diff --git a/arch/mips/bcm63xx/Makefile b/arch/mips/bcm63xx/Makefile
index 6dfdc69..4049cd5 100644
--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -1,5 +1,6 @@
obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
- dev-dsp.o dev-enet.o dev-pcmcia.o dev-uart.o dev-wdt.o
+ dev-dsp.o dev-enet.o dev-pcmcia.o dev-spi.o dev-uart.o \
+ dev-wdt.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-y += boards/
diff --git a/arch/mips/bcm63xx/dev-spi.c b/arch/mips/bcm63xx/dev-spi.c
new file mode 100644
index 0000000..67fa45b
--- /dev/null
+++ b/arch/mips/bcm63xx/dev-spi.c
@@ -0,0 +1,119 @@
+/*
+ * 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) 2009-2011 Florian Fainelli <florian@xxxxxxxxxxx>
+ * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@xxxxxxxxx>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_dev_spi.h>
+#include <bcm63xx_regs.h>
+
+#ifdef BCMCPU_RUNTIME_DETECT
+/*
+ * register offsets
+ */
+static const unsigned long bcm6338_regs_spi[] = {
+ __GEN_SPI_REGS_TABLE(6338)
+};
+
+static const unsigned long bcm6348_regs_spi[] = {
+ __GEN_SPI_REGS_TABLE(6348)
+};
+
+static const unsigned long bcm6358_regs_spi[] = {
+ __GEN_SPI_REGS_TABLE(6358)
+};
+
+static const unsigned long bcm6368_regs_spi[] = {
+ __GEN_SPI_REGS_TABLE(6368)
+};
+
+const unsigned long *bcm63xx_regs_spi;
+EXPORT_SYMBOL(bcm63xx_regs_spi);
+
+static __init void bcm63xx_spi_regs_init(void)
+{
+ if (BCMCPU_IS_6338())
+ bcm63xx_regs_spi = bcm6338_regs_spi;
+ if (BCMCPU_IS_6348())
+ bcm63xx_regs_spi = bcm6348_regs_spi;
+ if (BCMCPU_IS_6358())
+ bcm63xx_regs_spi = bcm6358_regs_spi;
+ if (BCMCPU_IS_6368())
+ bcm63xx_regs_spi = bcm6368_regs_spi;
+}
+#else
+static __init void bcm63xx_spi_regs_init(void) { }
+#endif
+
+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 = 8,
+};
+
+static struct platform_device bcm63xx_spi_device = {
+ .name = "bcm63xx-spi",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(spi_resources),
+ .resource = spi_resources,
+ .dev = {
+ .platform_data = &spi_pdata,
+ },
+};
+
+int __init bcm63xx_spi_register(void)
+{
+ struct clk *periph_clk;
+
+ if (BCMCPU_IS_6345())
+ return -ENODEV;
+
+ periph_clk = clk_get(NULL, "periph");
+ if (IS_ERR(periph_clk)) {
+ pr_err("unable to get periph clock\n");
+ return -ENODEV;
+ }
+
+ /* Set bus frequency */
+ spi_pdata.speed_hz = clk_get_rate(periph_clk);
+
+ spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
+ spi_resources[0].end = spi_resources[0].start;
+ spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
+
+ if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
+ spi_resources[0].end += BCM_6338_RSET_SPI_SIZE - 1;
+ spi_pdata.fifo_size = SPI_6338_MSG_DATA_SIZE;
+ }
+
+ if (BCMCPU_IS_6358() || BCMCPU_IS_6368()) {
+ spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1;
+ spi_pdata.fifo_size = SPI_6358_MSG_DATA_SIZE;
+ }
+
+ bcm63xx_spi_regs_init();
+
+ return platform_device_register(&bcm63xx_spi_device);
+}
diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
new file mode 100644
index 0000000..7d98dbe
--- /dev/null
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
@@ -0,0 +1,89 @@
+#ifndef BCM63XX_DEV_SPI_H
+#define BCM63XX_DEV_SPI_H
+
+#include <linux/types.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_regs.h>
+
+int __init bcm63xx_spi_register(void);
+
+struct bcm63xx_spi_pdata {
+ unsigned int fifo_size;
+ int bus_num;
+ int num_chipselect;
+ u32 speed_hz;
+};
+
+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,
+};
+
+#define __GEN_SPI_RSET_BASE(__cpu, __rset) \
+ case SPI_## __rset: \
+ return SPI_## __cpu ##_## __rset;
+
+#define __GEN_SPI_RSET(__cpu) \
+ switch (reg) { \
+ __GEN_SPI_RSET_BASE(__cpu, CMD) \
+ __GEN_SPI_RSET_BASE(__cpu, INT_STATUS) \
+ __GEN_SPI_RSET_BASE(__cpu, INT_MASK_ST) \
+ __GEN_SPI_RSET_BASE(__cpu, INT_MASK) \
+ __GEN_SPI_RSET_BASE(__cpu, ST) \
+ __GEN_SPI_RSET_BASE(__cpu, CLK_CFG) \
+ __GEN_SPI_RSET_BASE(__cpu, FILL_BYTE) \
+ __GEN_SPI_RSET_BASE(__cpu, MSG_TAIL) \
+ __GEN_SPI_RSET_BASE(__cpu, RX_TAIL) \
+ __GEN_SPI_RSET_BASE(__cpu, MSG_CTL) \
+ __GEN_SPI_RSET_BASE(__cpu, MSG_DATA) \
+ __GEN_SPI_RSET_BASE(__cpu, RX_DATA) \
+ }
+
+#define __GEN_SPI_REGS_TABLE(__cpu) \
+ [SPI_CMD] = SPI_## __cpu ##_CMD, \
+ [SPI_INT_STATUS] = SPI_## __cpu ##_INT_STATUS, \
+ [SPI_INT_MASK_ST] = SPI_## __cpu ##_INT_MASK_ST, \
+ [SPI_INT_MASK] = SPI_## __cpu ##_INT_MASK, \
+ [SPI_ST] = SPI_## __cpu ##_ST, \
+ [SPI_CLK_CFG] = SPI_## __cpu ##_CLK_CFG, \
+ [SPI_FILL_BYTE] = SPI_## __cpu ##_FILL_BYTE, \
+ [SPI_MSG_TAIL] = SPI_## __cpu ##_MSG_TAIL, \
+ [SPI_RX_TAIL] = SPI_## __cpu ##_RX_TAIL, \
+ [SPI_MSG_CTL] = SPI_## __cpu ##_MSG_CTL, \
+ [SPI_MSG_DATA] = SPI_## __cpu ##_MSG_DATA, \
+ [SPI_RX_DATA] = SPI_## __cpu ##_RX_DATA,
+
+static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
+{
+#ifdef BCMCPU_RUNTIME_DETECT
+ extern const unsigned long *bcm63xx_regs_spi;
+
+ return bcm63xx_regs_spi[reg];
+#else
+#ifdef CONFIG_BCM63XX_CPU_6338
+ __GEN_SPI_RSET(6338)
+#endif
+#ifdef CONFIG_BCM63XX_CPU_6348
+ __GEN_SPI_RSET(6348)
+#endif
+#ifdef CONFIG_BCM63XX_CPU_6358
+ __GEN_SPI_RSET(6358)
+#endif
+#ifdef CONFIG_BCM63XX_CPU_6368
+ __GEN_SPI_RSET(6368)
+#endif
+#endif
+ return 0;
+}
+
+#endif /* BCM63XX_DEV_SPI_H */
--
1.7.5.4
