[lantiq] adds 3.3 patches and files

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31307 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 633 insertions, 0 deletions

diff --git a/target/linux/lantiq/patches-3.3/0035-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch b/target/linux/lantiq/patches-3.3/0035-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch
new file mode 100644
index 0000000000..2b5e694528
--- /dev/null
+++ b/target/linux/lantiq/patches-3.3/0035-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch
@@ -0,0 +1,633 @@
+From efa434fed99cee45778d824b34ccabb473a978ec Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sat, 27 Aug 2011 18:12:26 +0200
+Subject: [PATCH 35/70] SPI: MIPS: lantiq: add FALC-ON spi driver
+
+The external bus unit (EBU) found on the FALC-ON SoC has spi emulation that is
+designed for serial flash access. This driver has only been tested with m25p80
+type chips. The hardware has no support for other types of spi peripherals.
+
+Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Cc: spi-devel-general@lists.sourceforge.net
+---
+ arch/mips/lantiq/falcon/devices.c        |   13 +
+ arch/mips/lantiq/falcon/devices.h        |    4 +
+ arch/mips/lantiq/falcon/mach-easy98000.c |   27 ++
+ drivers/spi/Kconfig                      |    4 +
+ drivers/spi/Makefile                     |    1 +
+ drivers/spi/spi-falcon.c                 |  483 ++++++++++++++++++++++++++++++
+ 6 files changed, 532 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/spi/spi-falcon.c
+
+diff --git a/arch/mips/lantiq/falcon/devices.c b/arch/mips/lantiq/falcon/devices.c
+index 6cd7a88..92ec571 100644
+--- a/arch/mips/lantiq/falcon/devices.c
++++ b/arch/mips/lantiq/falcon/devices.c
+@@ -121,3 +121,16 @@ falcon_register_gpio_extra(void)
+ 	platform_device_register_simple("falcon_gpio", 4,
+ 		falcon_gpio4_res, ARRAY_SIZE(falcon_gpio4_res));
+ }
++
++/* spi flash */
++static struct platform_device ltq_spi = {
++	.name			= "falcon_spi",
++	.num_resources		= 0,
++};
++
++void __init
++falcon_register_spi_flash(struct spi_board_info *data)
++{
++	spi_register_board_info(data, 1);
++	platform_device_register(&ltq_spi);
++}
+diff --git a/arch/mips/lantiq/falcon/devices.h b/arch/mips/lantiq/falcon/devices.h
+index 18be8b6..5e6f720 100644
+--- a/arch/mips/lantiq/falcon/devices.h
++++ b/arch/mips/lantiq/falcon/devices.h
+@@ -11,10 +11,14 @@
+ #ifndef _FALCON_DEVICES_H__
+ #define _FALCON_DEVICES_H__
+ 
++#include <linux/spi/spi.h>
++#include <linux/spi/flash.h>
++
+ #include "../devices.h"
+ 
+ extern void falcon_register_nand(void);
+ extern void falcon_register_gpio(void);
+ extern void falcon_register_gpio_extra(void);
++extern void falcon_register_spi_flash(struct spi_board_info *data);
+ 
+ #endif
+diff --git a/arch/mips/lantiq/falcon/mach-easy98000.c b/arch/mips/lantiq/falcon/mach-easy98000.c
+index 361b8f0..1a7caad 100644
+--- a/arch/mips/lantiq/falcon/mach-easy98000.c
++++ b/arch/mips/lantiq/falcon/mach-easy98000.c
+@@ -40,6 +40,21 @@ struct physmap_flash_data easy98000_nor_flash_data = {
+ 	.parts		= easy98000_nor_partitions,
+ };
+ 
++static struct flash_platform_data easy98000_spi_flash_platform_data = {
++	.name = "sflash",
++	.parts = easy98000_nor_partitions,
++	.nr_parts = ARRAY_SIZE(easy98000_nor_partitions)
++};
++
++static struct spi_board_info easy98000_spi_flash_data __initdata = {
++	.modalias		= "m25p80",
++	.bus_num		= 0,
++	.chip_select		= 0,
++	.max_speed_hz		= 10 * 1000 * 1000,
++	.mode			= SPI_MODE_3,
++	.platform_data		= &easy98000_spi_flash_platform_data
++};
++
+ /* setup gpio based spi bus/device for access to the eeprom on the board */
+ #define SPI_GPIO_MRST		102
+ #define SPI_GPIO_MTSR		103
+@@ -93,6 +108,13 @@ easy98000_init(void)
+ }
+ 
+ static void __init
++easy98000sf_init(void)
++{
++	easy98000_init_common();
++	falcon_register_spi_flash(&easy98000_spi_flash_data);
++}
++
++static void __init
+ easy98000nand_init(void)
+ {
+ 	easy98000_init_common();
+@@ -104,6 +126,11 @@ MIPS_MACHINE(LANTIQ_MACH_EASY98000,
+ 			"EASY98000 Eval Board",
+ 			easy98000_init);
+ 
++MIPS_MACHINE(LANTIQ_MACH_EASY98000SF,
++			"EASY98000SF",
++			"EASY98000 Eval Board (Serial Flash)",
++			easy98000sf_init);
++
+ MIPS_MACHINE(LANTIQ_MACH_EASY98000NAND,
+ 			"EASY98000NAND",
+ 			"EASY98000 Eval Board (NAND Flash)",
+diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
+index 8293658..41f8336 100644
+--- a/drivers/spi/Kconfig
++++ b/drivers/spi/Kconfig
+@@ -179,6 +179,10 @@ config SPI_MPC52xx
+ 	  This drivers supports the MPC52xx SPI controller in master SPI
+ 	  mode.
+ 
++config SPI_FALCON
++	tristate "Falcon SPI controller support"
++	depends on SOC_FALCON
++
+ config SPI_MPC52xx_PSC
+ 	tristate "Freescale MPC52xx PSC SPI controller"
+ 	depends on PPC_MPC52xx && EXPERIMENTAL
+diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
+index 61c3261..570894c 100644
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -25,6 +25,7 @@ obj-$(CONFIG_SPI_DW_MMIO)		+= spi-dw-mmio.o
+ obj-$(CONFIG_SPI_DW_PCI)		+= spi-dw-midpci.o
+ spi-dw-midpci-objs			:= spi-dw-pci.o spi-dw-mid.o
+ obj-$(CONFIG_SPI_EP93XX)		+= spi-ep93xx.o
++obj-$(CONFIG_SPI_FALCON)		+= spi-falcon.o
+ obj-$(CONFIG_SPI_FSL_LIB)		+= spi-fsl-lib.o
+ obj-$(CONFIG_SPI_FSL_ESPI)		+= spi-fsl-espi.o
+ obj-$(CONFIG_SPI_FSL_SPI)		+= spi-fsl-spi.o
+diff --git a/drivers/spi/spi-falcon.c b/drivers/spi/spi-falcon.c
+new file mode 100644
+index 0000000..447bbaa
+--- /dev/null
++++ b/drivers/spi/spi-falcon.c
+@@ -0,0 +1,483 @@
++/*
++ *  This program is free software; you can redistribute it and/or modify it
++ *  under the terms of the GNU General Public License version 2 as published
++ *  by the Free Software Foundation.
++ *
++ *  Copyright (C) 2010 Thomas Langer <thomas.langer@lantiq.com>
++ */
++
++#include <linux/module.h>
++#include <linux/device.h>
++#include <linux/platform_device.h>
++#include <linux/spi/spi.h>
++#include <linux/delay.h>
++#include <linux/workqueue.h>
++
++#include <lantiq_soc.h>
++
++#define DRV_NAME			"falcon_spi"
++
++#define FALCON_SPI_XFER_BEGIN		(1 << 0)
++#define FALCON_SPI_XFER_END		(1 << 1)
++
++/* Bus Read Configuration Register0 */
++#define LTQ_BUSRCON0	0x00000010
++/* Bus Write Configuration Register0 */
++#define LTQ_BUSWCON0	0x00000018
++/* Serial Flash Configuration Register */
++#define LTQ_SFCON	0x00000080
++/* Serial Flash Time Register */
++#define LTQ_SFTIME	0x00000084
++/* Serial Flash Status Register */
++#define LTQ_SFSTAT	0x00000088
++/* Serial Flash Command Register */
++#define LTQ_SFCMD	0x0000008C
++/* Serial Flash Address Register */
++#define LTQ_SFADDR	0x00000090
++/* Serial Flash Data Register */
++#define LTQ_SFDATA	0x00000094
++/* Serial Flash I/O Control Register */
++#define LTQ_SFIO	0x00000098
++/* EBU Clock Control Register */
++#define LTQ_EBUCC	0x000000C4
++
++/* Dummy Phase Length */
++#define SFCMD_DUMLEN_OFFSET	16
++#define SFCMD_DUMLEN_MASK	0x000F0000
++/* Chip Select */
++#define SFCMD_CS_OFFSET		24
++#define SFCMD_CS_MASK		0x07000000
++/* field offset */
++#define SFCMD_ALEN_OFFSET	20
++#define SFCMD_ALEN_MASK		0x00700000
++/* SCK Rise-edge Position */
++#define SFTIME_SCKR_POS_OFFSET	8
++#define SFTIME_SCKR_POS_MASK	0x00000F00
++/* SCK Period */
++#define SFTIME_SCK_PER_OFFSET	0
++#define SFTIME_SCK_PER_MASK	0x0000000F
++/* SCK Fall-edge Position */
++#define SFTIME_SCKF_POS_OFFSET	12
++#define SFTIME_SCKF_POS_MASK	0x0000F000
++/* Device Size */
++#define SFCON_DEV_SIZE_A23_0	0x03000000
++#define SFCON_DEV_SIZE_MASK	0x0F000000
++/* Read Data Position */
++#define SFTIME_RD_POS_MASK	0x000F0000
++/* Data Output */
++#define SFIO_UNUSED_WD_MASK	0x0000000F
++/* Command Opcode mask */
++#define SFCMD_OPC_MASK		0x000000FF
++/* dlen bytes of data to write */
++#define SFCMD_DIR_WRITE		0x00000100
++/* Data Length offset */
++#define SFCMD_DLEN_OFFSET	9
++/* Command Error */
++#define SFSTAT_CMD_ERR		0x20000000
++/* Access Command Pending */
++#define SFSTAT_CMD_PEND		0x00400000
++/* Frequency set to 100MHz. */
++#define EBUCC_EBUDIV_SELF100	0x00000001
++/* Serial Flash */
++#define BUSRCON0_AGEN_SERIAL_FLASH	0xF0000000
++/* 8-bit multiplexed */
++#define BUSRCON0_PORTW_8_BIT_MUX	0x00000000
++/* Serial Flash */
++#define BUSWCON0_AGEN_SERIAL_FLASH	0xF0000000
++/* Chip Select after opcode */
++#define SFCMD_KEEP_CS_KEEP_SELECTED	0x00008000
++
++struct falcon_spi {
++	u32 sfcmd; /* for caching of opcode, direction, ... */
++	struct spi_master *master;
++};
++
++int
++falcon_spi_xfer(struct spi_device *spi,
++		    struct spi_transfer *t,
++		    unsigned long flags)
++{
++	struct device *dev = &spi->dev;
++	struct falcon_spi *priv = spi_master_get_devdata(spi->master);
++	const u8 *txp = t->tx_buf;
++	u8 *rxp = t->rx_buf;
++	unsigned int bytelen = ((8 * t->len + 7) / 8);
++	unsigned int len, alen, dumlen;
++	u32 val;
++	enum {
++		state_init,
++		state_command_prepare,
++		state_write,
++		state_read,
++		state_disable_cs,
++		state_end
++	} state = state_init;
++
++	do {
++		switch (state) {
++		case state_init: /* detect phase of upper layer sequence */
++		{
++			/* initial write ? */
++			if (flags & FALCON_SPI_XFER_BEGIN) {
++				if (!txp) {
++					dev_err(dev,
++						"BEGIN without tx data!\n");
++					return -1;
++				}
++				/*
++				 * Prepare the parts of the sfcmd register,
++				 * which should not
++				 * change during a sequence!
++				 * Only exception are the length fields,
++				 * especially alen and dumlen.
++				 */
++
++				priv->sfcmd = ((spi->chip_select
++						<< SFCMD_CS_OFFSET)
++					       & SFCMD_CS_MASK);
++				priv->sfcmd |= SFCMD_KEEP_CS_KEEP_SELECTED;
++				priv->sfcmd |= *txp;
++				txp++;
++				bytelen--;
++				if (bytelen) {
++					/*
++					 * more data:
++					 * maybe address and/or dummy
++					 */
++					state = state_command_prepare;
++					break;
++				} else {
++					dev_dbg(dev, "write cmd %02X\n",
++						priv->sfcmd & SFCMD_OPC_MASK);
++				}
++			}
++			/* continued write ? */
++			if (txp && bytelen) {
++				state = state_write;
++				break;
++			}
++			/* read data? */
++			if (rxp && bytelen) {
++				state = state_read;
++				break;
++			}
++			/* end of sequence? */
++			if (flags & FALCON_SPI_XFER_END)
++				state = state_disable_cs;
++			else
++				state = state_end;
++			break;
++		}
++		/* collect tx data for address and dummy phase */
++		case state_command_prepare:
++		{
++			/* txp is valid, already checked */
++			val = 0;
++			alen = 0;
++			dumlen = 0;
++			while (bytelen > 0) {
++				if (alen < 3) {
++					val = (val<<8)|(*txp++);
++					alen++;
++				} else if ((dumlen < 15) && (*txp == 0)) {
++					/*
++					 * assume dummy bytes are set to 0
++					 * from upper layer
++					 */
++					dumlen++;
++					txp++;
++				} else
++					break;
++				bytelen--;
++			}
++			priv->sfcmd &= ~(SFCMD_ALEN_MASK | SFCMD_DUMLEN_MASK);
++			priv->sfcmd |= (alen << SFCMD_ALEN_OFFSET) |
++					 (dumlen << SFCMD_DUMLEN_OFFSET);
++			if (alen > 0)
++				ltq_ebu_w32(val, LTQ_SFADDR);
++
++			dev_dbg(dev, "write cmd %02X, alen=%d "
++				"(addr=%06X) dumlen=%d\n",
++				priv->sfcmd & SFCMD_OPC_MASK,
++				alen, val, dumlen);
++
++			if (bytelen > 0) {
++				/* continue with write */
++				state = state_write;
++			} else if (flags & FALCON_SPI_XFER_END) {
++				/* end of sequence? */
++				state = state_disable_cs;
++			} else {
++				/*
++				 * go to end and expect another
++				 * call (read or write)
++				 */
++				state = state_end;
++			}
++			break;
++		}
++		case state_write:
++		{
++			/* txp still valid */
++			priv->sfcmd |= SFCMD_DIR_WRITE;
++			len = 0;
++			val = 0;
++			do {
++				if (bytelen--)
++					val |= (*txp++) << (8 * len++);
++				if ((flags & FALCON_SPI_XFER_END)
++				    && (bytelen == 0)) {
++					priv->sfcmd &=
++						~SFCMD_KEEP_CS_KEEP_SELECTED;
++				}
++				if ((len == 4) || (bytelen == 0)) {
++					ltq_ebu_w32(val, LTQ_SFDATA);
++					ltq_ebu_w32(priv->sfcmd
++						| (len<<SFCMD_DLEN_OFFSET),
++						LTQ_SFCMD);
++					len = 0;
++					val = 0;
++					priv->sfcmd &= ~(SFCMD_ALEN_MASK
++							 | SFCMD_DUMLEN_MASK);
++				}
++			} while (bytelen);
++			state = state_end;
++			break;
++		}
++		case state_read:
++		{
++			/* read data */
++			priv->sfcmd &= ~SFCMD_DIR_WRITE;
++			do {
++				if ((flags & FALCON_SPI_XFER_END)
++				    && (bytelen <= 4)) {
++					priv->sfcmd &=
++						~SFCMD_KEEP_CS_KEEP_SELECTED;
++				}
++				len = (bytelen > 4) ? 4 : bytelen;
++				bytelen -= len;
++				ltq_ebu_w32(priv->sfcmd
++					|(len<<SFCMD_DLEN_OFFSET), LTQ_SFCMD);
++				priv->sfcmd &= ~(SFCMD_ALEN_MASK
++						 | SFCMD_DUMLEN_MASK);
++				do {
++					val = ltq_ebu_r32(LTQ_SFSTAT);
++					if (val & SFSTAT_CMD_ERR) {
++						/* reset error status */
++						dev_err(dev, "SFSTAT: CMD_ERR "
++							"(%x)\n", val);
++						ltq_ebu_w32(SFSTAT_CMD_ERR,
++							LTQ_SFSTAT);
++						return -1;
++					}
++				} while (val & SFSTAT_CMD_PEND);
++				val = ltq_ebu_r32(LTQ_SFDATA);
++				do {
++					*rxp = (val & 0xFF);
++					rxp++;
++					val >>= 8;
++					len--;
++				} while (len);
++			} while (bytelen);
++			state = state_end;
++			break;
++		}
++		case state_disable_cs:
++		{
++			priv->sfcmd &= ~SFCMD_KEEP_CS_KEEP_SELECTED;
++			ltq_ebu_w32(priv->sfcmd | (0 << SFCMD_DLEN_OFFSET),
++				LTQ_SFCMD);
++			val = ltq_ebu_r32(LTQ_SFSTAT);
++			if (val & SFSTAT_CMD_ERR) {
++				/* reset error status */
++				dev_err(dev, "SFSTAT: CMD_ERR (%x)\n", val);
++				ltq_ebu_w32(SFSTAT_CMD_ERR, LTQ_SFSTAT);
++				return -1;
++			}
++			state = state_end;
++			break;
++		}
++		case state_end:
++			break;
++		}
++	} while (state != state_end);
++
++	return 0;
++}
++
++static int
++falcon_spi_setup(struct spi_device *spi)
++{
++	struct device *dev = &spi->dev;
++	const u32 ebuclk = 100000000;
++	unsigned int i;
++	unsigned long flags;
++
++	dev_dbg(dev, "setup\n");
++
++	if (spi->master->bus_num > 0 || spi->chip_select > 0)
++		return -ENODEV;
++
++	spin_lock_irqsave(&ebu_lock, flags);
++
++	if (ebuclk < spi->max_speed_hz) {
++		/* set EBU clock to 100 MHz */
++		ltq_sys1_w32_mask(0, EBUCC_EBUDIV_SELF100, LTQ_EBUCC);
++		i = 1; /* divider */
++	} else {
++		/* set EBU clock to 50 MHz */
++		ltq_sys1_w32_mask(EBUCC_EBUDIV_SELF100, 0, LTQ_EBUCC);
++
++		/* search for suitable divider */
++		for (i = 1; i < 7; i++) {
++			if (ebuclk / i <= spi->max_speed_hz)
++				break;
++		}
++	}
++
++	/* setup period of serial clock */
++	ltq_ebu_w32_mask(SFTIME_SCKF_POS_MASK
++		     | SFTIME_SCKR_POS_MASK
++		     | SFTIME_SCK_PER_MASK,
++		     (i << SFTIME_SCKR_POS_OFFSET)
++		     | (i << (SFTIME_SCK_PER_OFFSET + 1)),
++		     LTQ_SFTIME);
++
++	/*
++	 * set some bits of unused_wd, to not trigger HOLD/WP
++	 * signals on non QUAD flashes
++	 */
++	ltq_ebu_w32((SFIO_UNUSED_WD_MASK & (0x8 | 0x4)), LTQ_SFIO);
++
++	ltq_ebu_w32(BUSRCON0_AGEN_SERIAL_FLASH | BUSRCON0_PORTW_8_BIT_MUX,
++		LTQ_BUSRCON0);
++	ltq_ebu_w32(BUSWCON0_AGEN_SERIAL_FLASH, LTQ_BUSWCON0);
++	/* set address wrap around to maximum for 24-bit addresses */
++	ltq_ebu_w32_mask(SFCON_DEV_SIZE_MASK, SFCON_DEV_SIZE_A23_0, LTQ_SFCON);
++
++	spin_unlock_irqrestore(&ebu_lock, flags);
++
++	return 0;
++}
++
++static int
++falcon_spi_transfer(struct spi_device *spi, struct spi_message *m)
++{
++	struct falcon_spi *priv = spi_master_get_devdata(spi->master);
++	struct spi_transfer *t;
++	unsigned long spi_flags;
++	unsigned long flags;
++	int ret = 0;
++
++	priv->sfcmd = 0;
++	m->actual_length = 0;
++
++	spi_flags = FALCON_SPI_XFER_BEGIN;
++	list_for_each_entry(t, &m->transfers, transfer_list) {
++		if (list_is_last(&t->transfer_list, &m->transfers))
++			spi_flags |= FALCON_SPI_XFER_END;
++
++		spin_lock_irqsave(&ebu_lock, flags);
++		ret = falcon_spi_xfer(spi, t, spi_flags);
++		spin_unlock_irqrestore(&ebu_lock, flags);
++
++		if (ret)
++			break;
++
++		m->actual_length += t->len;
++
++		if (t->delay_usecs || t->cs_change)
++			BUG();
++
++		spi_flags = 0;
++	}
++
++	m->status = ret;
++	m->complete(m->context);
++
++	return 0;
++}
++
++static void
++falcon_spi_cleanup(struct spi_device *spi)
++{
++	struct device *dev = &spi->dev;
++
++	dev_dbg(dev, "cleanup\n");
++}
++
++static int __devinit
++falcon_spi_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct falcon_spi *priv;
++	struct spi_master *master;
++	int ret;
++
++	dev_dbg(dev, "probing\n");
++
++	master = spi_alloc_master(&pdev->dev, sizeof(*priv));
++	if (!master) {
++		dev_err(dev, "no memory for spi_master\n");
++		return -ENOMEM;
++	}
++
++	priv = spi_master_get_devdata(master);
++	priv->master = master;
++
++	master->mode_bits = SPI_MODE_3;
++	master->num_chipselect = 1;
++	master->bus_num = 0;
++
++	master->setup = falcon_spi_setup;
++	master->transfer = falcon_spi_transfer;
++	master->cleanup = falcon_spi_cleanup;
++
++	platform_set_drvdata(pdev, priv);
++
++	ret = spi_register_master(master);
++	if (ret)
++		spi_master_put(master);
++
++	return ret;
++}
++
++static int __devexit
++falcon_spi_remove(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct falcon_spi *priv = platform_get_drvdata(pdev);
++
++	dev_dbg(dev, "removed\n");
++
++	spi_unregister_master(priv->master);
++
++	return 0;
++}
++
++static struct platform_driver falcon_spi_driver = {
++	.probe	= falcon_spi_probe,
++	.remove	= __devexit_p(falcon_spi_remove),
++	.driver = {
++		.name	= DRV_NAME,
++		.owner	= THIS_MODULE
++	}
++};
++
++static int __init
++falcon_spi_init(void)
++{
++	return platform_driver_register(&falcon_spi_driver);
++}
++
++static void __exit
++falcon_spi_exit(void)
++{
++	platform_driver_unregister(&falcon_spi_driver);
++}
++
++module_init(falcon_spi_init);
++module_exit(falcon_spi_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("Lantiq Falcon SPI controller driver");
+-- 
+1.7.9.1
+