diff options
author | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-27 16:12:59 +0000 |
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committer | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-27 16:12:59 +0000 |
commit | c9e0ccf07c715d71b9b8c845d6e7e033678c5557 (patch) | |
tree | 485e6a0b0929d17808b879fb639626c07fd463fc /target/linux/lantiq/patches-3.2/0038-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch | |
parent | c8e24ec13e92ee8eb93797907fe362347bdde609 (diff) |
[lantiq] 3.2 R.I.P.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31911 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/lantiq/patches-3.2/0038-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch')
-rw-r--r-- | target/linux/lantiq/patches-3.2/0038-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch | 617 |
1 files changed, 0 insertions, 617 deletions
diff --git a/target/linux/lantiq/patches-3.2/0038-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch b/target/linux/lantiq/patches-3.2/0038-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch deleted file mode 100644 index 3b2cc8022..000000000 --- a/target/linux/lantiq/patches-3.2/0038-SPI-MIPS-lantiq-add-FALC-ON-spi-driver.patch +++ /dev/null @@ -1,617 +0,0 @@ -From addbb26930d41b35e329d0ad6413cc8d087aa4cc Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Sat, 27 Aug 2011 18:12:26 +0200 -Subject: [PATCH 38/73] 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 - ---- 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(<q_spi); -+} ---- 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 ---- 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_ - .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)", ---- a/drivers/spi/Kconfig -+++ b/drivers/spi/Kconfig -@@ -189,6 +189,10 @@ 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 ---- a/drivers/spi/Makefile -+++ b/drivers/spi/Makefile -@@ -25,6 +25,7 @@ obj-$(CONFIG_SPI_DW_MMIO) += spi-dw-mmi - obj-$(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 ---- /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"); |