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openwrt/target/linux/brcm63xx/patches-2.6.37/240-spi.patch
Hauke Mehrtens 3dbb8c5088 brcm47xx: add fallback sprom for pci devices without an own sprom. 
If there is no sprom on an ssb based pci device on the brcm47xx
architecture ssb now asks the architecture code to look into the nvram
to get some sprom data for this device. Now we are able to read out
pci/1/1/ foo or pci/1/3/ foo config options.

This will fix some problems where the wireless devices does not got an
mac address and the following message was show:
ssb: WARNING: Invalid SPROM CRC (corrupt SPROM)

SVN-Revision: 26801
2011-05-01 20:28:35 +00:00

1003 lines
27 KiB
Diff
Raw Blame History

--- a/arch/mips/bcm63xx/cpu.c
+++ b/arch/mips/bcm63xx/cpu.c
@@ -58,6 +58,7 @@ static const unsigned long bcm96338_regs
static const int bcm96338_irqs[] = {
[IRQ_TIMER] = BCM_6338_TIMER_IRQ,
+ [IRQ_SPI] = BCM_6338_SPI_IRQ,
[IRQ_UART0] = BCM_6338_UART0_IRQ,
[IRQ_DSL] = BCM_6338_DSL_IRQ,
[IRQ_ENET0] = BCM_6338_ENET0_IRQ,
@@ -132,6 +133,7 @@ static const unsigned long bcm96348_regs
static const int bcm96348_irqs[] = {
[IRQ_TIMER] = BCM_6348_TIMER_IRQ,
+ [IRQ_SPI] = BCM_6348_SPI_IRQ,
[IRQ_UART0] = BCM_6348_UART0_IRQ,
[IRQ_DSL] = BCM_6348_DSL_IRQ,
[IRQ_ENET0] = BCM_6348_ENET0_IRQ,
@@ -175,6 +177,7 @@ static const unsigned long bcm96358_regs
static const int bcm96358_irqs[] = {
[IRQ_TIMER] = BCM_6358_TIMER_IRQ,
+ [IRQ_SPI] = BCM_6358_SPI_IRQ,
[IRQ_UART0] = BCM_6358_UART0_IRQ,
[IRQ_UART1] = BCM_6358_UART1_IRQ,
[IRQ_DSL] = BCM_6358_DSL_IRQ,
--- /dev/null
+++ b/arch/mips/bcm63xx/dev-spi.c
@@ -0,0 +1,128 @@
+/*
+ * 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>
+ * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_dev_spi.h>
+#include <bcm63xx_regs.h>
+
+#ifdef BCMCPU_RUNTIME_DETECT
+/*
+ * register offsets
+ */
+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,
+};
+
+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,
+};
+
+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_DATA,
+};
+
+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 = bcm96338_regs_spi;
+ if (BCMCPU_IS_6348())
+ bcm63xx_regs_spi = bcm96348_regs_spi;
+ if (BCMCPU_IS_6358())
+ bcm63xx_regs_spi = bcm96358_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,
+ .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 = {
+ .platform_data = &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 (BCMCPU_IS_6338() || BCMCPU_IS_6348())
+ spi_pdata.fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
+
+ if (BCMCPU_IS_6358())
+ spi_pdata.fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
+
+ bcm63xx_spi_regs_init();
+
+ return platform_device_register(&bcm63xx_spi_device);
+}
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
@@ -109,6 +109,7 @@ enum bcm63xx_regs_set {
#define RSET_WDT_SIZE 12
#define RSET_ENET_SIZE 2048
#define RSET_ENETDMA_SIZE 2048
+#define RSET_SPI_SIZE 256
#define RSET_UART_SIZE 24
#define RSET_UDC_SIZE 256
#define RSET_OHCI_SIZE 256
@@ -214,7 +215,7 @@ enum bcm63xx_regs_set {
#define BCM_6358_UART0_BASE (0xfffe0100)
#define BCM_6358_UART1_BASE (0xfffe0120)
#define BCM_6358_GPIO_BASE (0xfffe0080)
-#define BCM_6358_SPI_BASE (0xdeadbeef)
+#define BCM_6358_SPI_BASE (0xfffe0800)
#define BCM_6358_UDC0_BASE (0xfffe0400)
#define BCM_6358_OHCI0_BASE (0xfffe1400)
#define BCM_6358_OHCI_PRIV_BASE (0xdeadbeef)
@@ -441,6 +442,7 @@ static inline unsigned long bcm63xx_regs
*/
enum bcm63xx_irq {
IRQ_TIMER = 0,
+ IRQ_SPI,
IRQ_UART0,
IRQ_UART1,
IRQ_DSL,
@@ -507,6 +509,7 @@ enum bcm63xx_irq {
* 6348 irqs
*/
#define BCM_6348_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
+#define BCM_6348_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
#define BCM_6348_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
#define BCM_6348_DSL_IRQ (IRQ_INTERNAL_BASE + 4)
#define BCM_6348_UDC0_IRQ (IRQ_INTERNAL_BASE + 6)
@@ -531,6 +534,7 @@ enum bcm63xx_irq {
* 6358 irqs
*/
#define BCM_6358_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
+#define BCM_6358_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
#define BCM_6358_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
#define BCM_6358_UART1_IRQ (IRQ_INTERNAL_BASE + 3)
#define BCM_6358_OHCI0_IRQ (IRQ_INTERNAL_BASE + 5)
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
@@ -769,4 +769,116 @@
#define DMIPSPLLCFG_N2_SHIFT 29
#define DMIPSPLLCFG_N2_MASK (0x7 << DMIPSPLLCFG_N2_SHIFT)
+/*************************************************************************
+ * _REG relative to RSET_SPI
+ *************************************************************************/
+
+/* BCM 6338 SPI core */
+#define SPI_BCM_6338_SPI_CMD 0x00 /* 16-bits register */
+#define SPI_BCM_6338_SPI_INT_STATUS 0x02
+#define SPI_BCM_6338_SPI_MASK_INT_ST 0x03
+#define SPI_BCM_6338_SPI_INT_MASK 0x04
+#define SPI_BCM_6338_SPI_ST 0x05
+#define SPI_BCM_6338_SPI_CLK_CFG 0x06
+#define SPI_BCM_6338_SPI_FILL_BYTE 0x07
+#define SPI_BCM_6338_SPI_MSG_TAIL 0x09
+#define SPI_BCM_6338_SPI_RX_TAIL 0x0b
+#define SPI_BCM_6338_SPI_MSG_CTL 0x40
+#define SPI_BCM_6338_SPI_MSG_DATA 0x41
+#define SPI_BCM_6338_SPI_MSG_DATA_SIZE 0x3f
+#define SPI_BCM_6338_SPI_RX_DATA 0x80
+#define SPI_BCM_6338_SPI_RX_DATA_SIZE 0x3f
+
+/* BCM 6348 SPI core */
+#define SPI_BCM_6348_SPI_MASK_INT_ST 0x00
+#define SPI_BCM_6348_SPI_INT_STATUS 0x01
+#define SPI_BCM_6348_SPI_CMD 0x02 /* 16-bits register */
+#define SPI_BCM_6348_SPI_FILL_BYTE 0x04
+#define SPI_BCM_6348_SPI_CLK_CFG 0x05
+#define SPI_BCM_6348_SPI_ST 0x06
+#define SPI_BCM_6348_SPI_INT_MASK 0x07
+#define SPI_BCM_6348_SPI_RX_TAIL 0x08
+#define SPI_BCM_6348_SPI_MSG_TAIL 0x10
+#define SPI_BCM_6348_SPI_MSG_DATA 0x40
+#define SPI_BCM_6348_SPI_MSG_CTL 0x42
+#define SPI_BCM_6348_SPI_MSG_DATA_SIZE 0x3f
+#define SPI_BCM_6348_SPI_RX_DATA 0x80
+#define SPI_BCM_6348_SPI_RX_DATA_SIZE 0x3f
+
+/* BCM 6358 SPI core */
+#define SPI_BCM_6358_MSG_CTL 0x00 /* 16-bits register */
+
+#define SPI_BCM_6358_SPI_MSG_DATA 0x02
+#define SPI_BCM_6358_SPI_MSG_DATA_SIZE 0x21e
+
+#define SPI_BCM_6358_SPI_RX_DATA 0x400
+#define SPI_BCM_6358_SPI_RX_DATA_SIZE 0x220
+
+#define SPI_BCM_6358_SPI_CMD 0x700 /* 16-bits register */
+
+#define SPI_BCM_6358_SPI_INT_STATUS 0x702
+#define SPI_BCM_6358_SPI_MASK_INT_ST 0x703
+
+#define SPI_BCM_6358_SPI_INT_MASK 0x704
+
+#define SPI_BCM_6358_SPI_STATUS 0x705
+
+#define SPI_BCM_6358_SPI_CLK_CFG 0x706
+
+#define SPI_BCM_6358_SPI_FILL_BYTE 0x707
+#define SPI_BCM_6358_SPI_MSG_TAIL 0x709
+#define SPI_BCM_6358_SPI_RX_TAIL 0x70B
+
+/* Shared SPI definitions */
+
+/* Message configuration */
+#define SPI_FD_RW 0x00
+#define SPI_HD_W 0x01
+#define SPI_HD_R 0x02
+#define SPI_BYTE_CNT_SHIFT 0
+#define SPI_MSG_TYPE_SHIFT 14
+
+/* Command */
+#define SPI_CMD_NOOP 0x01
+#define SPI_CMD_SOFT_RESET 0x02
+#define SPI_CMD_HARD_RESET 0x04
+#define SPI_CMD_START_IMMEDIATE 0x08
+#define SPI_CMD_COMMAND_SHIFT 0
+#define SPI_CMD_COMMAND_MASK 0x000f
+#define SPI_CMD_DEVICE_ID_SHIFT 4
+#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
+#define SPI_CMD_ONE_BYTE_SHIFT 11
+#define SPI_CMD_ONE_WIRE_SHIFT 12
+#define SPI_DEV_ID_0 0
+#define SPI_DEV_ID_1 1
+#define SPI_DEV_ID_2 2
+#define SPI_DEV_ID_3 3
+
+/* Interrupt mask */
+#define SPI_INTR_CMD_DONE 0x01
+#define SPI_INTR_RX_OVERFLOW 0x02
+#define SPI_INTR_TX_UNDERFLOW 0x04
+#define SPI_INTR_TX_OVERFLOW 0x08
+#define SPI_INTR_RX_UNDERFLOW 0x10
+#define SPI_INTR_CLEAR_ALL 0x1f
+
+/* Status */
+#define SPI_RX_EMPTY 0x02
+#define SPI_CMD_BUSY 0x04
+#define SPI_SERIAL_BUSY 0x08
+
+/* Clock configuration */
+#define SPI_CLK_20MHZ 0x00
+#define SPI_CLK_0_391MHZ 0x01
+#define SPI_CLK_0_781MHZ 0x02 /* default */
+#define SPI_CLK_1_563MHZ 0x03
+#define SPI_CLK_3_125MHZ 0x04
+#define SPI_CLK_6_250MHZ 0x05
+#define SPI_CLK_12_50MHZ 0x06
+#define SPI_CLK_25MHZ 0x07
+#define SPI_CLK_MASK 0x07
+#define SPI_SSOFFTIME_MASK 0x38
+#define SPI_SSOFFTIME_SHIFT 3
+#define SPI_BYTE_SWAP 0x80
+
#endif /* BCM63XX_REGS_H_ */
--- /dev/null
+++ b/drivers/spi/bcm63xx_spi.c
@@ -0,0 +1,496 @@
+/*
+ * Broadcom BCM63xx SPI controller support
+ *
+ * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
+ * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/spi/spi.h>
+#include <linux/completion.h>
+#include <linux/err.h>
+
+#include <bcm63xx_dev_spi.h>
+
+#define PFX KBUILD_MODNAME
+#define DRV_VER "0.1.2"
+
+struct bcm63xx_spi {
+ spinlock_t lock;
+ int stopping;
+ struct completion done;
+
+ void __iomem *regs;
+ int irq;
+
+ /* Platform data */
+ u32 speed_hz;
+ unsigned fifo_size;
+
+ /* Data buffers */
+ const unsigned char *tx_ptr;
+ unsigned char *rx_ptr;
+
+ /* data iomem */
+ u8 __iomem *tx_io;
+ const u8 __iomem *rx_io;
+
+ int remaining_bytes;
+
+ struct clk *clk;
+ struct platform_device *pdev;
+};
+
+static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
+ unsigned int offset)
+{
+ return bcm_readw(bs->regs + bcm63xx_spireg(offset));
+}
+
+static inline u16 bcm_spi_readw(struct bcm63xx_spi *bs,
+ unsigned int offset)
+{
+ return bcm_readw(bs->regs + bcm63xx_spireg(offset));
+}
+
+static inline void bcm_spi_writeb(struct bcm63xx_spi *bs,
+ u8 value, unsigned int offset)
+{
+ bcm_writeb(value, bs->regs + bcm63xx_spireg(offset));
+}
+
+static inline void bcm_spi_writew(struct bcm63xx_spi *bs,
+ u16 value, unsigned int offset)
+{
+ bcm_writew(value, bs->regs + bcm63xx_spireg(offset));
+}
+
+static int bcm63xx_spi_setup_transfer(struct spi_device *spi,
+ struct spi_transfer *t)
+{
+ u8 bits_per_word;
+ u8 clk_cfg;
+ u32 hz;
+ unsigned int div;
+
+ struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
+
+ bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
+ hz = (t) ? t->speed_hz : spi->max_speed_hz;
+ if (bits_per_word != 8) {
+ dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
+ __func__, bits_per_word);
+ return -EINVAL;
+ }
+
+ if (spi->chip_select > spi->master->num_chipselect) {
+ dev_err(&spi->dev, "%s, unsupported slave %d\n",
+ __func__, spi->chip_select);
+ return -EINVAL;
+ }
+
+ /* Check clock setting */
+ div = (bs->speed_hz / hz);
+ switch (div) {
+ case 2:
+ clk_cfg = SPI_CLK_25MHZ;
+ break;
+ case 4:
+ clk_cfg = SPI_CLK_12_50MHZ;
+ break;
+ case 8:
+ clk_cfg = SPI_CLK_6_250MHZ;
+ break;
+ case 16:
+ clk_cfg = SPI_CLK_3_125MHZ;
+ break;
+ case 32:
+ clk_cfg = SPI_CLK_1_563MHZ;
+ break;
+ case 64:
+ clk_cfg = SPI_CLK_0_781MHZ;
+ break;
+ case 128:
+ default:
+ /* Set to slowest mode for compatibility */
+ clk_cfg = SPI_CLK_0_391MHZ;
+ break;
+ }
+
+ bcm_spi_writeb(bs, clk_cfg, SPI_CLK_CFG);
+ dev_dbg(&spi->dev, "Setting clock register to %d (hz %d, cmd %02x)\n",
+ div, hz, clk_cfg);
+
+ return 0;
+}
+
+/* the spi->mode bits understood by this driver: */
+#define MODEBITS (SPI_CPOL | SPI_CPHA)
+
+static int bcm63xx_spi_setup(struct spi_device *spi)
+{
+ struct bcm63xx_spi *bs;
+ int ret;
+
+ bs = spi_master_get_devdata(spi->master);
+
+ if (bs->stopping)
+ return -ESHUTDOWN;
+
+ if (!spi->bits_per_word)
+ spi->bits_per_word = 8;
+
+ if (spi->mode & ~MODEBITS) {
+ dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
+ __func__, spi->mode & ~MODEBITS);
+ return -EINVAL;
+ }
+
+ ret = bcm63xx_spi_setup_transfer(spi, NULL);
+ if (ret < 0) {
+ dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
+ spi->mode & ~MODEBITS);
+ return ret;
+ }
+
+ dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
+ __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
+
+ return 0;
+}
+
+/* Fill the TX FIFO with as many bytes as possible */
+static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
+{
+ u8 size;
+
+ /* Fill the Tx FIFO with as many bytes as possible */
+ size = bs->remaining_bytes < bs->fifo_size ? bs->remaining_bytes :
+ bs->fifo_size;
+ memcpy_toio(bs->tx_io, bs->tx_ptr, size);
+ bs->remaining_bytes -= size;
+}
+
+static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
+{
+ struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
+ u16 msg_ctl;
+ u16 cmd;
+
+ dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
+ t->tx_buf, t->rx_buf, t->len);
+
+ /* Transmitter is inhibited */
+ bs->tx_ptr = t->tx_buf;
+ bs->rx_ptr = t->rx_buf;
+ init_completion(&bs->done);
+
+ if (t->tx_buf) {
+ bs->remaining_bytes = t->len;
+ bcm63xx_spi_fill_tx_fifo(bs);
+ }
+
+ /* Enable the command done interrupt which
+ * we use to determine completion of a command */
+ bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
+
+ /* Fill in the Message control register */
+ msg_ctl = (t->len << SPI_BYTE_CNT_SHIFT);
+
+ if (t->rx_buf && t->tx_buf)
+ msg_ctl |= (SPI_FD_RW << SPI_MSG_TYPE_SHIFT);
+ else if (t->rx_buf)
+ msg_ctl |= (SPI_HD_R << SPI_MSG_TYPE_SHIFT);
+ else if (t->tx_buf)
+ msg_ctl |= (SPI_HD_W << SPI_MSG_TYPE_SHIFT);
+
+ bcm_spi_writew(bs, msg_ctl, SPI_MSG_CTL);
+
+ /* Issue the transfer */
+ cmd = SPI_CMD_START_IMMEDIATE;
+ cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
+ cmd |= (spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
+ bcm_spi_writew(bs, cmd, SPI_CMD);
+ wait_for_completion(&bs->done);
+
+ /* Disable the CMD_DONE interrupt */
+ bcm_spi_writeb(bs, 0, SPI_INT_MASK);
+
+ return t->len - bs->remaining_bytes;
+}
+
+static int bcm63xx_transfer(struct spi_device *spi, struct spi_message *m)
+{
+ struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
+ struct spi_transfer *t;
+ int ret = 0;
+
+ if (unlikely(list_empty(&m->transfers)))
+ return -EINVAL;
+
+ if (bs->stopping)
+ return -ESHUTDOWN;
+
+ list_for_each_entry(t, &m->transfers, transfer_list) {
+ ret += bcm63xx_txrx_bufs(spi, t);
+ }
+
+ m->complete(m->context);
+
+ return ret;
+}
+
+/* This driver supports single master mode only. Hence
+ * CMD_DONE is the only interrupt we care about
+ */
+static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
+{
+ struct spi_master *master = (struct spi_master *)dev_id;
+ struct bcm63xx_spi *bs = spi_master_get_devdata(master);
+ u8 intr;
+ u16 cmd;
+
+ /* Read interupts and clear them immediately */
+ intr = bcm_spi_readb(bs, SPI_INT_STATUS);
+ bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
+ bcm_spi_writeb(bs, 0, SPI_INT_MASK);
+
+ /* A tansfer completed */
+ if (intr & SPI_INTR_CMD_DONE) {
+ u8 rx_tail;
+
+ rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
+
+ /* Read out all the data */
+ if (rx_tail)
+ memcpy_fromio(bs->rx_ptr, bs->rx_io, rx_tail);
+
+ /* See if there is more data to send */
+ if (bs->remaining_bytes > 0) {
+ bcm63xx_spi_fill_tx_fifo(bs);
+
+ /* Start the transfer */
+ bcm_spi_writew(bs, SPI_HD_W << SPI_MSG_TYPE_SHIFT,
+ SPI_MSG_CTL);
+ cmd = bcm_spi_readw(bs, SPI_CMD);
+ cmd |= SPI_CMD_START_IMMEDIATE;
+ cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
+ bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
+ bcm_spi_writew(bs, cmd, SPI_CMD);
+ } else {
+ complete(&bs->done);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+
+static int __init bcm63xx_spi_probe(struct platform_device *pdev)
+{
+ struct resource *r;
+ struct device *dev = &pdev->dev;
+ struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
+ int irq;
+ struct spi_master *master;
+ struct clk *clk;
+ struct bcm63xx_spi *bs;
+ int ret;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r) {
+ dev_err(dev, "no iomem\n");
+ ret = -ENXIO;
+ goto out;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "no irq\n");
+ ret = -ENXIO;
+ goto out;
+ }
+
+ clk = clk_get(dev, "spi");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "no clock for device\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ master = spi_alloc_master(dev, sizeof(*bs));
+ if (!master) {
+ dev_err(dev, "out of memory\n");
+ ret = -ENOMEM;
+ goto out_free;
+ }
+
+ bs = spi_master_get_devdata(master);
+ init_completion(&bs->done);
+
+ platform_set_drvdata(pdev, master);
+ bs->pdev = pdev;
+
+ if (!request_mem_region(r->start, r->end - r->start, PFX)) {
+ dev_err(dev, "iomem request failed\n");
+ ret = -ENXIO;
+ goto out_put_master;
+ }
+
+ bs->regs = ioremap_nocache(r->start, r->end - r->start);
+ if (!bs->regs) {
+ dev_err(dev, "unable to ioremap regs\n");
+ ret = -ENOMEM;
+ goto out_put_master;
+ }
+ bs->irq = irq;
+ bs->clk = clk;
+ bs->fifo_size = pdata->fifo_size;
+
+ ret = request_irq(irq, bcm63xx_spi_interrupt, 0, pdev->name, master);
+ if (ret) {
+ dev_err(dev, "unable to request irq\n");
+ goto out_unmap;
+ }
+
+ master->bus_num = pdata->bus_num;
+ master->num_chipselect = pdata->num_chipselect;
+ master->setup = bcm63xx_spi_setup;
+ master->transfer = bcm63xx_transfer;
+ bs->speed_hz = pdata->speed_hz;
+ bs->stopping = 0;
+ bs->tx_io = (u8*)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
+ bs->rx_io = (const u8*)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
+ spin_lock_init(&bs->lock);
+
+ /* Initialize hardware */
+ clk_enable(bs->clk);
+ bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
+
+ /* register and we are done */
+ ret = spi_register_master(master);
+ if (ret) {
+ dev_err(dev, "spi register failed\n");
+ goto out_reset_hw;
+ }
+
+ dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d) v%s\n",
+ r->start, irq, bs->fifo_size, DRV_VER);
+
+ return 0;
+
+out_reset_hw:
+ clk_disable(clk);
+ free_irq(irq, master);
+out_unmap:
+ iounmap(bs->regs);
+out_put_master:
+ spi_master_put(master);
+out_free:
+ clk_put(clk);
+out:
+ return ret;
+}
+
+static int __exit bcm63xx_spi_remove(struct platform_device *pdev)
+{
+ struct spi_master *master = platform_get_drvdata(pdev);
+ struct bcm63xx_spi *bs = spi_master_get_devdata(master);
+ struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ /* reset spi block */
+ bcm_spi_writeb(bs, 0, SPI_INT_MASK);
+ spin_lock(&bs->lock);
+ bs->stopping = 1;
+
+ /* HW shutdown */
+ clk_disable(bs->clk);
+ clk_put(bs->clk);
+
+ spin_unlock(&bs->lock);
+
+ free_irq(bs->irq, master);
+ iounmap(bs->regs);
+ release_mem_region(r->start, r->end - r->start);
+ platform_set_drvdata(pdev, 0);
+ spi_unregister_master(master);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int bcm63xx_spi_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ struct spi_master *master = platform_get_drvdata(pdev);
+ struct bcm63xx_spi *bs = spi_master_get_devdata(master);
+
+ clk_disable(bs->clk);
+
+ return 0;
+}
+
+static int bcm63xx_spi_resume(struct platform_device *pdev)
+{
+ struct spi_master *master = platform_get_drvdata(pdev);
+ struct bcm63xx_spi *bs = spi_master_get_devdata(master);
+
+ clk_enable(bs->clk);
+
+ return 0;
+}
+#else
+#define bcm63xx_spi_suspend NULL
+#define bcm63xx_spi_resume NULL
+#endif
+
+static struct platform_driver bcm63xx_spi_driver = {
+ .driver = {
+ .name = "bcm63xx-spi",
+ .owner = THIS_MODULE,
+ },
+ .probe = bcm63xx_spi_probe,
+ .remove = __exit_p(bcm63xx_spi_remove),
+ .suspend = bcm63xx_spi_suspend,
+ .resume = bcm63xx_spi_resume,
+};
+
+
+static int __init bcm63xx_spi_init(void)
+{
+ return platform_driver_register(&bcm63xx_spi_driver);
+}
+
+static void __exit bcm63xx_spi_exit(void)
+{
+ platform_driver_unregister(&bcm63xx_spi_driver);
+}
+
+module_init(bcm63xx_spi_init);
+module_exit(bcm63xx_spi_exit);
+
+MODULE_ALIAS("platform:bcm63xx_spi");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_AUTHOR("Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>");
+MODULE_DESCRIPTION("Broadcom BCM63xx SPI Controller driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VER);
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -60,6 +60,12 @@ config SPI_ATMEL
This selects a driver for the Atmel SPI Controller, present on
many AT32 (AVR32) and AT91 (ARM) chips.
+config SPI_BCM63XX
+ tristate "Broadcom BCM63xx SPI controller"
+ depends on BCM63XX
+ help
+ This is the SPI controller master driver for Broadcom BCM63xx SoC.
+
config SPI_BFIN
tristate "SPI controller driver for ADI Blackfin5xx"
depends on BLACKFIN
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.
obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
obj-$(CONFIG_SPI_NUC900) += spi_nuc900.o
+obj-$(CONFIG_SPI_BCM63XX) += bcm63xx_spi.o
# special build for s3c24xx spi driver with fiq support
spi_s3c24xx_hw-y := spi_s3c24xx.o
--- /dev/null
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
@@ -0,0 +1,126 @@
+#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,
+};
+
+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
+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_MASK:
+ return SPI_BCM_6348_SPI_INT_MASK;
+ 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_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_DATA;
+}
+#endif
+#endif
+ return 0;
+}
+
+#endif /* BCM63XX_DEV_SPI_H */
--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -1,6 +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-usb-ohci.o dev-usb-ehci.o dev-usb-udc.o
+ dev-usb-ohci.o dev-usb-ehci.o dev-usb-udc.o dev-spi.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-y += boards/
--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
+++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
@@ -33,6 +33,7 @@
#include <bcm63xx_dev_usb_ohci.h>
#include <bcm63xx_dev_usb_ehci.h>
#include <bcm63xx_dev_usb_udc.h>
+#include <bcm63xx_dev_spi.h>
#include <board_bcm963xx.h>
#define PFX "board_bcm963xx: "
@@ -1587,6 +1588,9 @@ int __init board_register_devices(void)
if (board.num_spis)
spi_register_board_info(board.spis, board.num_spis);
+ if (!BCMCPU_IS_6345())
+ bcm63xx_spi_register();
+
/* read base address of boot chip select (0) */
if (BCMCPU_IS_6345())
val = 0x1fc00000;
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