diff options
author | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-08-03 08:53:02 +0000 |
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committer | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-08-03 08:53:02 +0000 |
commit | cea2b4210d9b3706cad3cc60cc54dde063e09b58 (patch) | |
tree | 81a9746583b2c1c212f8c35a51d07d9353080561 /target/linux/lantiq/patches-3.3/0036-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch | |
parent | 6b899d5deac5b0ad531d7a7f2d1d241727848535 (diff) |
[lantiq] cleanup patches
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32953 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/lantiq/patches-3.3/0036-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch')
-rw-r--r-- | target/linux/lantiq/patches-3.3/0036-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch | 1204 |
1 files changed, 0 insertions, 1204 deletions
diff --git a/target/linux/lantiq/patches-3.3/0036-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch b/target/linux/lantiq/patches-3.3/0036-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch deleted file mode 100644 index 8107450c12..0000000000 --- a/target/linux/lantiq/patches-3.3/0036-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch +++ /dev/null @@ -1,1204 +0,0 @@ -From 59e21a2ab9b7554acf2c15dc9ee191e76bebade7 Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Fri, 4 Nov 2011 16:00:34 +0100 -Subject: [PATCH 36/70] I2C: MIPS: lantiq: add FALC-ON i2c bus master - -This patch adds the driver needed to make the I2C bus work on FALC-ON SoCs. - -Signed-off-by: Thomas Langer <thomas.langer@lantiq.com> -Signed-off-by: John Crispin <blogic@openwrt.org> -Cc: linux-i2c@vger.kernel.org ---- - .../include/asm/mach-lantiq/falcon/lantiq_soc.h | 5 + - arch/mips/lantiq/falcon/clk.c | 44 - - arch/mips/lantiq/falcon/devices.c | 16 + - arch/mips/lantiq/falcon/devices.h | 1 + - arch/mips/lantiq/falcon/mach-easy98000.c | 1 + - drivers/i2c/busses/Kconfig | 10 + - drivers/i2c/busses/Makefile | 1 + - drivers/i2c/busses/i2c-falcon.c | 1040 ++++++++++++++++++++ - 8 files changed, 1074 insertions(+), 44 deletions(-) - delete mode 100644 arch/mips/lantiq/falcon/clk.c - create mode 100644 drivers/i2c/busses/i2c-falcon.c - ---- a/arch/mips/include/asm/mach-lantiq/falcon/lantiq_soc.h -+++ b/arch/mips/include/asm/mach-lantiq/falcon/lantiq_soc.h -@@ -72,6 +72,10 @@ - #define LTQ_PADCTRL4_BASE_ADDR 0x1E800600 - #define LTQ_PADCTRL4_SIZE 0x0100 - -+/* I2C */ -+#define GPON_I2C_BASE 0x1E200000 -+#define GPON_I2C_SIZE 0x00010000 -+ - /* CHIP ID */ - #define LTQ_STATUS_BASE_ADDR 0x1E802000 - -@@ -106,6 +110,7 @@ - #define ACTS_PADCTRL2 0x00200000 - #define ACTS_PADCTRL3 0x00200000 - #define ACTS_PADCTRL4 0x00400000 -+#define ACTS_I2C_ACT 0x00004000 - - /* global register ranges */ - extern __iomem void *ltq_ebu_membase; ---- a/arch/mips/lantiq/falcon/clk.c -+++ /dev/null -@@ -1,44 +0,0 @@ --/* -- * 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) 2011 Thomas Langer <thomas.langer@lantiq.com> -- * Copyright (C) 2011 John Crispin <blogic@openwrt.org> -- */ -- --#include <linux/ioport.h> --#include <linux/export.h> -- --#include <lantiq_soc.h> -- --#include "devices.h" -- --/* CPU0 Clock Control Register */ --#define LTQ_SYS1_CPU0CC 0x0040 --/* clock divider bit */ --#define LTQ_CPU0CC_CPUDIV 0x0001 -- --unsigned int --ltq_get_io_region_clock(void) --{ -- return CLOCK_200M; --} --EXPORT_SYMBOL(ltq_get_io_region_clock); -- --unsigned int --ltq_get_cpu_hz(void) --{ -- if (ltq_sys1_r32(LTQ_SYS1_CPU0CC) & LTQ_CPU0CC_CPUDIV) -- return CLOCK_200M; -- else -- return CLOCK_400M; --} --EXPORT_SYMBOL(ltq_get_cpu_hz); -- --unsigned int --ltq_get_fpi_hz(void) --{ -- return CLOCK_100M; --} --EXPORT_SYMBOL(ltq_get_fpi_hz); ---- a/arch/mips/lantiq/falcon/devices.c -+++ b/arch/mips/lantiq/falcon/devices.c -@@ -134,3 +134,19 @@ falcon_register_spi_flash(struct spi_boa - spi_register_board_info(data, 1); - platform_device_register(<q_spi); - } -+ -+/* i2c */ -+static struct resource falcon_i2c_resources[] = { -+ MEM_RES("i2c", GPON_I2C_BASE, GPON_I2C_SIZE), -+ IRQ_RES(i2c_lb, FALCON_IRQ_I2C_LBREQ), -+ IRQ_RES(i2c_b, FALCON_IRQ_I2C_BREQ), -+ IRQ_RES(i2c_err, FALCON_IRQ_I2C_I2C_ERR), -+ IRQ_RES(i2c_p, FALCON_IRQ_I2C_I2C_P), -+}; -+ -+void __init -+falcon_register_i2c(void) -+{ -+ platform_device_register_simple("i2c-falcon", 0, -+ falcon_i2c_resources, ARRAY_SIZE(falcon_i2c_resources)); -+} ---- a/arch/mips/lantiq/falcon/devices.h -+++ b/arch/mips/lantiq/falcon/devices.h -@@ -20,5 +20,6 @@ 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); -+extern void falcon_register_i2c(void); - - #endif ---- a/arch/mips/lantiq/falcon/mach-easy98000.c -+++ b/arch/mips/lantiq/falcon/mach-easy98000.c -@@ -98,6 +98,7 @@ easy98000_init_common(void) - { - spi_register_board_info(&easy98000_spi_gpio_devices, 1); - platform_device_register(&easy98000_spi_gpio_device); -+ falcon_register_i2c(); - } - - static void __init ---- a/drivers/i2c/busses/Kconfig -+++ b/drivers/i2c/busses/Kconfig -@@ -369,6 +369,16 @@ config I2C_DESIGNWARE_PCI - This driver can also be built as a module. If so, the module - will be called i2c-designware-pci. - -+config I2C_FALCON -+ tristate "Falcon I2C interface" -+ depends on SOC_FALCON -+ help -+ If you say yes to this option, support will be included for the -+ Lantiq FALC-ON I2C core. -+ -+ This driver can also be built as a module. If so, the module -+ will be called i2c-falcon. -+ - config I2C_GPIO - tristate "GPIO-based bitbanging I2C" - depends on GENERIC_GPIO ---- a/drivers/i2c/busses/Makefile -+++ b/drivers/i2c/busses/Makefile -@@ -37,6 +37,7 @@ obj-$(CONFIG_I2C_DESIGNWARE_PLATFORM) += - i2c-designware-platform-objs := i2c-designware-platdrv.o i2c-designware-core.o - obj-$(CONFIG_I2C_DESIGNWARE_PCI) += i2c-designware-pci.o - i2c-designware-pci-objs := i2c-designware-pcidrv.o i2c-designware-core.o -+obj-$(CONFIG_I2C_FALCON) += i2c-falcon.o - obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o - obj-$(CONFIG_I2C_HIGHLANDER) += i2c-highlander.o - obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o ---- /dev/null -+++ b/drivers/i2c/busses/i2c-falcon.c -@@ -0,0 +1,1040 @@ -+/* -+ * Lantiq FALC(tm) ON - I2C bus adapter -+ * -+ * Parts based on i2c-designware.c and other i2c drivers from Linux 2.6.33 -+ * -+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA. -+ * -+ * Copyright (C) 2010 Thomas Langer <thomas.langer@lantiq.com> -+ */ -+ -+/* -+ * CURRENT ISSUES: -+ * - no high speed support -+ * - supports only master mode -+ * - ten bit mode is not tested (no slave devices) -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/delay.h> -+#include <linux/slab.h> -+#include <linux/i2c.h> -+#include <linux/clk.h> -+#include <linux/errno.h> -+#include <linux/sched.h> -+#include <linux/err.h> -+#include <linux/interrupt.h> -+#include <linux/platform_device.h> -+#include <linux/io.h> -+#include <linux/err.h> -+#include <linux/gpio.h> -+ -+#include <lantiq_soc.h> -+ -+/* I2C Identification Register */ -+/* Module ID */ -+#define I2C_ID_ID_MASK 0x0000FF00 -+/* field offset */ -+#define I2C_ID_ID_OFFSET 8 -+/* Revision */ -+#define I2C_ID_REV_MASK 0x000000FF -+/* field offset */ -+#define I2C_ID_REV_OFFSET 0 -+ -+/* I2C Error Interrupt Request Source Status Register */ -+/* TXF_OFL */ -+#define I2C_ERR_IRQSS_TXF_OFL 0x00000008 -+/* TXF_UFL */ -+#define I2C_ERR_IRQSS_TXF_UFL 0x00000004 -+/* RXF_OFL */ -+#define I2C_ERR_IRQSS_RXF_OFL 0x00000002 -+/* RXF_UFL */ -+#define I2C_ERR_IRQSS_RXF_UFL 0x00000001 -+ -+/* I2C Bus Status Register */ -+/* Bus Status */ -+#define I2C_BUS_STAT_BS_MASK 0x00000003 -+/* I2C Bus is free. */ -+#define I2C_BUS_STAT_BS_FREE 0x00000000 -+/* -+ * The device is working as master and has claimed the control -+ * on the I2C-bus (busy master). -+ */ -+#define I2C_BUS_STAT_BS_BM 0x00000002 -+ -+/* I2C Interrupt Clear Register */ -+/* Clear */ -+#define I2C_ICR_BREQ_INT_CLR 0x00000008 -+/* Clear */ -+#define I2C_ICR_LBREQ_INT_CLR 0x00000004 -+ -+/* I2C RUN Control Register */ -+/* Enable */ -+#define I2C_RUN_CTRL_RUN_EN 0x00000001 -+ -+/* I2C Kernel Clock Control Register */ -+/* field offset */ -+#define I2C_CLC_RMC_OFFSET 8 -+/* Enable */ -+#define I2C_IMSC_I2C_P_INT_EN 0x00000020 -+/* Enable */ -+#define I2C_IMSC_I2C_ERR_INT_EN 0x00000010 -+/* Enable */ -+#define I2C_IMSC_BREQ_INT_EN 0x00000008 -+/* Enable */ -+#define I2C_IMSC_LBREQ_INT_EN 0x00000004 -+ -+/* I2C Fractional Divider Configuration Register */ -+/* field offset */ -+#define I2C_FDIV_CFG_INC_OFFSET 16 -+/* field offset */ -+#define I2C_FDIV_CFG_DEC_OFFSET 0 -+ -+/* I2C Fractional Divider (highspeed mode) Configuration Register */ -+/* field offset */ -+#define I2C_FDIV_HIGH_CFG_INC_OFFSET 16 -+/* field offset */ -+#define I2C_FDIV_HIGH_CFG_DEC_OFFSET 0 -+ -+/* I2C Address Register */ -+/* Enable */ -+#define I2C_ADDR_CFG_SOPE_EN 0x00200000 -+/* Enable */ -+#define I2C_ADDR_CFG_SONA_EN 0x00100000 -+/* Enable */ -+#define I2C_ADDR_CFG_MnS_EN 0x00080000 -+ -+/* I2C Protocol Interrupt Request Source Status Register */ -+/* RX */ -+#define I2C_P_IRQSS_RX 0x00000040 -+/* TX_END */ -+#define I2C_P_IRQSS_TX_END 0x00000020 -+/* NACK */ -+#define I2C_P_IRQSS_NACK 0x00000010 -+/* AL */ -+#define I2C_P_IRQSS_AL 0x00000008 -+ -+/* I2C Raw Interrupt Status Register */ -+/* Read: Interrupt occurred. */ -+#define I2C_RIS_I2C_P_INT_INTOCC 0x00000020 -+/* Read: Interrupt occurred. */ -+#define I2C_RIS_I2C_ERR_INT_INTOCC 0x00000010 -+ -+/* I2C End Data Control Register */ -+/* -+ * Set End of Transmission - Note: Do not write '1' to this bit when bus is -+ * free. This will cause an abort after the first byte when a new transfer -+ * is started. -+ */ -+#define I2C_ENDD_CTRL_SETEND 0x00000002 -+/* TX FIFO Flow Control */ -+#define I2C_FIFO_CFG_TXFC 0x00020000 -+/* RX FIFO Flow Control */ -+#define I2C_FIFO_CFG_RXFC 0x00010000 -+/* Word aligned (character alignment of four characters) */ -+#define I2C_FIFO_CFG_TXFA_TXFA2 0x00002000 -+/* Word aligned (character alignment of four characters) */ -+#define I2C_FIFO_CFG_RXFA_RXFA2 0x00000200 -+/* 1 word */ -+#define I2C_FIFO_CFG_TXBS_TXBS0 0x00000000 -+/* 1 word */ -+#define I2C_FIFO_CFG_RXBS_RXBS0 0x00000000 -+ -+ -+/* I2C register structure */ -+struct gpon_reg_i2c { -+ /* I2C Kernel Clock Control Register */ -+ unsigned int clc; /* 0x00000000 */ -+ /* Reserved */ -+ unsigned int res_0; /* 0x00000004 */ -+ /* I2C Identification Register */ -+ unsigned int id; /* 0x00000008 */ -+ /* Reserved */ -+ unsigned int res_1; /* 0x0000000C */ -+ /* -+ * I2C RUN Control Register - This register enables and disables the I2C -+ * peripheral. Before enabling, the I2C has to be configured properly. -+ * After enabling no configuration is possible -+ */ -+ unsigned int run_ctrl; /* 0x00000010 */ -+ /* -+ * I2C End Data Control Register - This register is used to either turn -+ * around the data transmission direction or to address another slave -+ * without sending a stop condition. Also the software can stop the -+ * slave-transmitter by sending a not-accolade when working as -+ * master-receiver or even stop data transmission immediately when -+ * operating as master-transmitter. The writing to the bits of this -+ * control register is only effective when in MASTER RECEIVES BYTES, -+ * MASTER TRANSMITS BYTES, MASTER RESTART or SLAVE RECEIVE BYTES state -+ */ -+ unsigned int endd_ctrl; /* 0x00000014 */ -+ /* -+ * I2C Fractional Divider Configuration Register - These register is -+ * used to program the fractional divider of the I2C bus. Before the -+ * peripheral is switched on by setting the RUN-bit the two (fixed) -+ * values for the two operating frequencies are programmed into these -+ * (configuration) registers. The Register FDIV_HIGH_CFG has the same -+ * layout as I2C_FDIV_CFG. -+ */ -+ unsigned int fdiv_cfg; /* 0x00000018 */ -+ /* -+ * I2C Fractional Divider (highspeed mode) Configuration Register -+ * These register is used to program the fractional divider of the I2C -+ * bus. Before the peripheral is switched on by setting the RUN-bit the -+ * two (fixed) values for the two operating frequencies are programmed -+ * into these (configuration) registers. The Register FDIV_CFG has the -+ * same layout as I2C_FDIV_CFG. -+ */ -+ unsigned int fdiv_high_cfg; /* 0x0000001C */ -+ /* I2C Address Configuration Register */ -+ unsigned int addr_cfg; /* 0x00000020 */ -+ /* -+ * I2C Bus Status Register - This register gives a status information -+ * of the I2C. This additional information can be used by the software -+ * to start proper actions. -+ */ -+ unsigned int bus_stat; /* 0x00000024 */ -+ /* I2C FIFO Configuration Register */ -+ unsigned int fifo_cfg; /* 0x00000028 */ -+ /* I2C Maximum Received Packet Size Register */ -+ unsigned int mrps_ctrl; /* 0x0000002C */ -+ /* I2C Received Packet Size Status Register */ -+ unsigned int rps_stat; /* 0x00000030 */ -+ /* I2C Transmit Packet Size Register */ -+ unsigned int tps_ctrl; /* 0x00000034 */ -+ /* I2C Filled FIFO Stages Status Register */ -+ unsigned int ffs_stat; /* 0x00000038 */ -+ /* Reserved */ -+ unsigned int res_2; /* 0x0000003C */ -+ /* I2C Timing Configuration Register */ -+ unsigned int tim_cfg; /* 0x00000040 */ -+ /* Reserved */ -+ unsigned int res_3[7]; /* 0x00000044 */ -+ /* I2C Error Interrupt Request Source Mask Register */ -+ unsigned int err_irqsm; /* 0x00000060 */ -+ /* I2C Error Interrupt Request Source Status Register */ -+ unsigned int err_irqss; /* 0x00000064 */ -+ /* I2C Error Interrupt Request Source Clear Register */ -+ unsigned int err_irqsc; /* 0x00000068 */ -+ /* Reserved */ -+ unsigned int res_4; /* 0x0000006C */ -+ /* I2C Protocol Interrupt Request Source Mask Register */ -+ unsigned int p_irqsm; /* 0x00000070 */ -+ /* I2C Protocol Interrupt Request Source Status Register */ -+ unsigned int p_irqss; /* 0x00000074 */ -+ /* I2C Protocol Interrupt Request Source Clear Register */ -+ unsigned int p_irqsc; /* 0x00000078 */ -+ /* Reserved */ -+ unsigned int res_5; /* 0x0000007C */ -+ /* I2C Raw Interrupt Status Register */ -+ unsigned int ris; /* 0x00000080 */ -+ /* I2C Interrupt Mask Control Register */ -+ unsigned int imsc; /* 0x00000084 */ -+ /* I2C Masked Interrupt Status Register */ -+ unsigned int mis; /* 0x00000088 */ -+ /* I2C Interrupt Clear Register */ -+ unsigned int icr; /* 0x0000008C */ -+ /* I2C Interrupt Set Register */ -+ unsigned int isr; /* 0x00000090 */ -+ /* I2C DMA Enable Register */ -+ unsigned int dmae; /* 0x00000094 */ -+ /* Reserved */ -+ unsigned int res_6[8154]; /* 0x00000098 */ -+ /* I2C Transmit Data Register */ -+ unsigned int txd; /* 0x00008000 */ -+ /* Reserved */ -+ unsigned int res_7[4095]; /* 0x00008004 */ -+ /* I2C Receive Data Register */ -+ unsigned int rxd; /* 0x0000C000 */ -+ /* Reserved */ -+ unsigned int res_8[4095]; /* 0x0000C004 */ -+}; -+ -+/* mapping for access macros */ -+#define i2c ((struct gpon_reg_i2c *)priv->membase) -+#define reg_r32(reg) __raw_readl(reg) -+#define reg_w32(val, reg) __raw_writel(val, reg) -+#define reg_w32_mask(clear, set, reg) \ -+ reg_w32((reg_r32(reg) & ~(clear)) | (set), reg) -+#define reg_r32_table(reg, idx) reg_r32(&((uint32_t *)®)[idx]) -+#define reg_w32_table(val, reg, idx) reg_w32(val, &((uint32_t *)®)[idx]) -+ -+#define i2c_r32(reg) reg_r32(&i2c->reg) -+#define i2c_w32(val, reg) reg_w32(val, &i2c->reg) -+#define i2c_w32_mask(clear, set, reg) reg_w32_mask(clear, set, &i2c->reg) -+ -+#define DRV_NAME "i2c-falcon" -+#define DRV_VERSION "1.01" -+ -+#define FALCON_I2C_BUSY_TIMEOUT 20 /* ms */ -+ -+#ifdef DEBUG -+#define FALCON_I2C_XFER_TIMEOUT (25 * HZ) -+#else -+#define FALCON_I2C_XFER_TIMEOUT HZ -+#endif -+#if defined(DEBUG) && 0 -+#define PRINTK(arg...) pr_info(arg) -+#else -+#define PRINTK(arg...) do {} while (0) -+#endif -+ -+#define FALCON_I2C_IMSC_DEFAULT_MASK (I2C_IMSC_I2C_P_INT_EN | \ -+ I2C_IMSC_I2C_ERR_INT_EN) -+ -+#define FALCON_I2C_ARB_LOST (1 << 0) -+#define FALCON_I2C_NACK (1 << 1) -+#define FALCON_I2C_RX_UFL (1 << 2) -+#define FALCON_I2C_RX_OFL (1 << 3) -+#define FALCON_I2C_TX_UFL (1 << 4) -+#define FALCON_I2C_TX_OFL (1 << 5) -+ -+struct falcon_i2c { -+ struct mutex mutex; -+ -+ enum { -+ FALCON_I2C_MODE_100 = 1, -+ FALCON_I2C_MODE_400 = 2, -+ FALCON_I2C_MODE_3400 = 3 -+ } mode; /* current speed mode */ -+ -+ struct clk *clk; /* clock input for i2c hardware block */ -+ struct gpon_reg_i2c __iomem *membase; /* base of mapped registers */ -+ int irq_lb, irq_b, irq_err, irq_p; /* last burst, burst, error, -+ protocol IRQs */ -+ -+ struct i2c_adapter adap; -+ struct device *dev; -+ -+ struct completion cmd_complete; -+ -+ /* message transfer data */ -+ /* current message */ -+ struct i2c_msg *current_msg; -+ /* number of messages to handle */ -+ int msgs_num; -+ /* current buffer */ -+ u8 *msg_buf; -+ /* remaining length of current buffer */ -+ u32 msg_buf_len; -+ /* error status of the current transfer */ -+ int msg_err; -+ -+ /* master status codes */ -+ enum { -+ STATUS_IDLE, -+ STATUS_ADDR, /* address phase */ -+ STATUS_WRITE, -+ STATUS_READ, -+ STATUS_READ_END, -+ STATUS_STOP -+ } status; -+}; -+ -+static irqreturn_t falcon_i2c_isr(int irq, void *dev_id); -+ -+static inline void enable_burst_irq(struct falcon_i2c *priv) -+{ -+ i2c_w32_mask(0, I2C_IMSC_LBREQ_INT_EN | I2C_IMSC_BREQ_INT_EN, imsc); -+} -+static inline void disable_burst_irq(struct falcon_i2c *priv) -+{ -+ i2c_w32_mask(I2C_IMSC_LBREQ_INT_EN | I2C_IMSC_BREQ_INT_EN, 0, imsc); -+} -+ -+static void prepare_msg_send_addr(struct falcon_i2c *priv) -+{ -+ struct i2c_msg *msg = priv->current_msg; -+ int rd = !!(msg->flags & I2C_M_RD); -+ u16 addr = msg->addr; -+ -+ /* new i2c_msg */ -+ priv->msg_buf = msg->buf; -+ priv->msg_buf_len = msg->len; -+ if (rd) -+ priv->status = STATUS_READ; -+ else -+ priv->status = STATUS_WRITE; -+ -+ /* send slave address */ -+ if (msg->flags & I2C_M_TEN) { -+ i2c_w32(0xf0 | ((addr & 0x300) >> 7) | rd, txd); -+ i2c_w32(addr & 0xff, txd); -+ } else -+ i2c_w32((addr & 0x7f) << 1 | rd, txd); -+} -+ -+static void set_tx_len(struct falcon_i2c *priv) -+{ -+ struct i2c_msg *msg = priv->current_msg; -+ int len = (msg->flags & I2C_M_TEN) ? 2 : 1; -+ -+ PRINTK("set_tx_len %cX\n", (msg->flags & I2C_M_RD) ? ('R') : ('T')); -+ -+ priv->status = STATUS_ADDR; -+ -+ if (!(msg->flags & I2C_M_RD)) { -+ len += msg->len; -+ } else { -+ /* set maximum received packet size (before rx int!) */ -+ i2c_w32(msg->len, mrps_ctrl); -+ } -+ i2c_w32(len, tps_ctrl); -+ enable_burst_irq(priv); -+} -+ -+static int falcon_i2c_hw_init(struct i2c_adapter *adap) -+{ -+ struct falcon_i2c *priv = i2c_get_adapdata(adap); -+ -+ /* disable bus */ -+ i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl); -+ -+#ifndef DEBUG -+ /* set normal operation clock divider */ -+ i2c_w32(1 << I2C_CLC_RMC_OFFSET, clc); -+#else -+ /* for debugging a higher divider value! */ -+ i2c_w32(0xF0 << I2C_CLC_RMC_OFFSET, clc); -+#endif -+ -+ /* set frequency */ -+ if (priv->mode == FALCON_I2C_MODE_100) { -+ dev_dbg(priv->dev, "set standard mode (100 kHz)\n"); -+ i2c_w32(0, fdiv_high_cfg); -+ i2c_w32((1 << I2C_FDIV_CFG_INC_OFFSET) | -+ (499 << I2C_FDIV_CFG_DEC_OFFSET), -+ fdiv_cfg); -+ } else if (priv->mode == FALCON_I2C_MODE_400) { -+ dev_dbg(priv->dev, "set fast mode (400 kHz)\n"); -+ i2c_w32(0, fdiv_high_cfg); -+ i2c_w32((1 << I2C_FDIV_CFG_INC_OFFSET) | -+ (124 << I2C_FDIV_CFG_DEC_OFFSET), -+ fdiv_cfg); -+ } else if (priv->mode == FALCON_I2C_MODE_3400) { -+ dev_dbg(priv->dev, "set high mode (3.4 MHz)\n"); -+ i2c_w32(0, fdiv_cfg); -+ /* TODO recalculate value for 100MHz input */ -+ i2c_w32((41 << I2C_FDIV_HIGH_CFG_INC_OFFSET) | -+ (152 << I2C_FDIV_HIGH_CFG_DEC_OFFSET), -+ fdiv_high_cfg); -+ } else { -+ dev_warn(priv->dev, "unknown mode\n"); -+ return -ENODEV; -+ } -+ -+ /* configure fifo */ -+ i2c_w32(I2C_FIFO_CFG_TXFC | /* tx fifo as flow controller */ -+ I2C_FIFO_CFG_RXFC | /* rx fifo as flow controller */ -+ I2C_FIFO_CFG_TXFA_TXFA2 | /* tx fifo 4-byte aligned */ -+ I2C_FIFO_CFG_RXFA_RXFA2 | /* rx fifo 4-byte aligned */ -+ I2C_FIFO_CFG_TXBS_TXBS0 | /* tx fifo burst size is 1 word */ -+ I2C_FIFO_CFG_RXBS_RXBS0, /* rx fifo burst size is 1 word */ -+ fifo_cfg); -+ -+ /* configure address */ -+ i2c_w32(I2C_ADDR_CFG_SOPE_EN | /* generate stop when no more data -+ in the fifo */ -+ I2C_ADDR_CFG_SONA_EN | /* generate stop when NA received */ -+ I2C_ADDR_CFG_MnS_EN | /* we are master device */ -+ 0, /* our slave address (not used!) */ -+ addr_cfg); -+ -+ /* enable bus */ -+ i2c_w32_mask(0, I2C_RUN_CTRL_RUN_EN, run_ctrl); -+ -+ return 0; -+} -+ -+static int falcon_i2c_wait_bus_not_busy(struct falcon_i2c *priv) -+{ -+ int timeout = FALCON_I2C_BUSY_TIMEOUT; -+ -+ while ((i2c_r32(bus_stat) & I2C_BUS_STAT_BS_MASK) -+ != I2C_BUS_STAT_BS_FREE) { -+ if (timeout <= 0) { -+ dev_warn(priv->dev, "timeout waiting for bus ready\n"); -+ return -ETIMEDOUT; -+ } -+ timeout--; -+ mdelay(1); -+ } -+ -+ return 0; -+} -+ -+static void falcon_i2c_tx(struct falcon_i2c *priv, int last) -+{ -+ if (priv->msg_buf_len && priv->msg_buf) { -+ i2c_w32(*priv->msg_buf, txd); -+ -+ if (--priv->msg_buf_len) -+ priv->msg_buf++; -+ else -+ priv->msg_buf = NULL; -+ } else -+ last = 1; -+ -+ if (last) -+ disable_burst_irq(priv); -+} -+ -+static void falcon_i2c_rx(struct falcon_i2c *priv, int last) -+{ -+ u32 fifo_stat, timeout; -+ if (priv->msg_buf_len && priv->msg_buf) { -+ timeout = 5000000; -+ do { -+ fifo_stat = i2c_r32(ffs_stat); -+ } while (!fifo_stat && --timeout); -+ if (!timeout) { -+ last = 1; -+ PRINTK("\nrx timeout\n"); -+ goto err; -+ } -+ while (fifo_stat) { -+ *priv->msg_buf = i2c_r32(rxd); -+ if (--priv->msg_buf_len) -+ priv->msg_buf++; -+ else { -+ priv->msg_buf = NULL; -+ last = 1; -+ break; -+ } -+ #if 0 -+ fifo_stat = i2c_r32(ffs_stat); -+ #else -+ /* do not read more than burst size, otherwise no "last -+ burst" is generated and the transaction is blocked! */ -+ fifo_stat = 0; -+ #endif -+ } -+ } else { -+ last = 1; -+ } -+err: -+ if (last) { -+ disable_burst_irq(priv); -+ -+ if (priv->status == STATUS_READ_END) { -+ /* do the STATUS_STOP and complete() here, as sometimes -+ the tx_end is already seen before this is finished */ -+ priv->status = STATUS_STOP; -+ complete(&priv->cmd_complete); -+ } else { -+ i2c_w32(I2C_ENDD_CTRL_SETEND, endd_ctrl); -+ priv->status = STATUS_READ_END; -+ } -+ } -+} -+ -+static void falcon_i2c_xfer_init(struct falcon_i2c *priv) -+{ -+ /* enable interrupts */ -+ i2c_w32(FALCON_I2C_IMSC_DEFAULT_MASK, imsc); -+ -+ /* trigger transfer of first msg */ -+ set_tx_len(priv); -+} -+ -+static void dump_msgs(struct i2c_msg msgs[], int num, int rx) -+{ -+#if defined(DEBUG) -+ int i, j; -+ pr_info("Messages %d %s\n", num, rx ? "out" : "in"); -+ for (i = 0; i < num; i++) { -+ pr_info("%2d %cX Msg(%d) addr=0x%X: ", i, -+ (msgs[i].flags & I2C_M_RD) ? ('R') : ('T'), -+ msgs[i].len, msgs[i].addr); -+ if (!(msgs[i].flags & I2C_M_RD) || rx) { -+ for (j = 0; j < msgs[i].len; j++) -+ printk("%02X ", msgs[i].buf[j]); -+ } -+ printk("\n"); -+ } -+#endif -+} -+ -+static void falcon_i2c_release_bus(struct falcon_i2c *priv) -+{ -+ if ((i2c_r32(bus_stat) & I2C_BUS_STAT_BS_MASK) == I2C_BUS_STAT_BS_BM) -+ i2c_w32(I2C_ENDD_CTRL_SETEND, endd_ctrl); -+} -+ -+static int falcon_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], -+ int num) -+{ -+ struct falcon_i2c *priv = i2c_get_adapdata(adap); -+ int ret; -+ -+ dev_dbg(priv->dev, "xfer %u messages\n", num); -+ dump_msgs(msgs, num, 0); -+ -+ mutex_lock(&priv->mutex); -+ -+ INIT_COMPLETION(priv->cmd_complete); -+ priv->current_msg = msgs; -+ priv->msgs_num = num; -+ priv->msg_err = 0; -+ priv->status = STATUS_IDLE; -+ -+ /* wait for the bus to become ready */ -+ ret = falcon_i2c_wait_bus_not_busy(priv); -+ if (ret) -+ goto done; -+ -+ while (priv->msgs_num) { -+ /* start the transfers */ -+ falcon_i2c_xfer_init(priv); -+ -+ /* wait for transfers to complete */ -+ ret = wait_for_completion_interruptible_timeout( -+ &priv->cmd_complete, FALCON_I2C_XFER_TIMEOUT); -+ if (ret == 0) { -+ dev_err(priv->dev, "controller timed out\n"); -+ falcon_i2c_hw_init(adap); -+ ret = -ETIMEDOUT; -+ goto done; -+ } else if (ret < 0) -+ goto done; -+ -+ if (priv->msg_err) { -+ if (priv->msg_err & FALCON_I2C_NACK) -+ ret = -ENXIO; -+ else -+ ret = -EREMOTEIO; -+ goto done; -+ } -+ if (--priv->msgs_num) -+ priv->current_msg++; -+ } -+ /* no error? */ -+ ret = num; -+ -+done: -+ falcon_i2c_release_bus(priv); -+ -+ mutex_unlock(&priv->mutex); -+ -+ if (ret >= 0) -+ dump_msgs(msgs, num, 1); -+ -+ PRINTK("XFER ret %d\n", ret); -+ return ret; -+} -+ -+static irqreturn_t falcon_i2c_isr_burst(int irq, void *dev_id) -+{ -+ struct falcon_i2c *priv = dev_id; -+ struct i2c_msg *msg = priv->current_msg; -+ int last = (irq == priv->irq_lb); -+ -+ if (last) -+ PRINTK("LB "); -+ else -+ PRINTK("B "); -+ -+ if (msg->flags & I2C_M_RD) { -+ switch (priv->status) { -+ case STATUS_ADDR: -+ PRINTK("X"); -+ prepare_msg_send_addr(priv); -+ disable_burst_irq(priv); -+ break; -+ case STATUS_READ: -+ case STATUS_READ_END: -+ PRINTK("R"); -+ falcon_i2c_rx(priv, last); -+ break; -+ default: -+ disable_burst_irq(priv); -+ PRINTK("Status R %d\n", priv->status); -+ break; -+ } -+ } else { -+ switch (priv->status) { -+ case STATUS_ADDR: -+ PRINTK("x"); -+ prepare_msg_send_addr(priv); -+ break; -+ case STATUS_WRITE: -+ PRINTK("w"); -+ falcon_i2c_tx(priv, last); -+ break; -+ default: -+ disable_burst_irq(priv); -+ PRINTK("Status W %d\n", priv->status); -+ break; -+ } -+ } -+ -+ i2c_w32(I2C_ICR_BREQ_INT_CLR | I2C_ICR_LBREQ_INT_CLR, icr); -+ return IRQ_HANDLED; -+} -+ -+static void falcon_i2c_isr_prot(struct falcon_i2c *priv) -+{ -+ u32 i_pro = i2c_r32(p_irqss); -+ -+ PRINTK("i2c-p"); -+ -+ /* not acknowledge */ -+ if (i_pro & I2C_P_IRQSS_NACK) { -+ priv->msg_err |= FALCON_I2C_NACK; -+ PRINTK(" nack"); -+ } -+ -+ /* arbitration lost */ -+ if (i_pro & I2C_P_IRQSS_AL) { -+ priv->msg_err |= FALCON_I2C_ARB_LOST; -+ PRINTK(" arb-lost"); -+ } -+ /* tx -> rx switch */ -+ if (i_pro & I2C_P_IRQSS_RX) -+ PRINTK(" rx"); -+ -+ /* tx end */ -+ if (i_pro & I2C_P_IRQSS_TX_END) -+ PRINTK(" txend"); -+ PRINTK("\n"); -+ -+ if (!priv->msg_err) { -+ /* tx -> rx switch */ -+ if (i_pro & I2C_P_IRQSS_RX) { -+ priv->status = STATUS_READ; -+ enable_burst_irq(priv); -+ } -+ if (i_pro & I2C_P_IRQSS_TX_END) { -+ if (priv->status == STATUS_READ) -+ priv->status = STATUS_READ_END; -+ else { -+ disable_burst_irq(priv); -+ priv->status = STATUS_STOP; -+ } -+ } -+ } -+ -+ i2c_w32(i_pro, p_irqsc); -+} -+ -+static irqreturn_t falcon_i2c_isr(int irq, void *dev_id) -+{ -+ u32 i_raw, i_err = 0; -+ struct falcon_i2c *priv = dev_id; -+ -+ i_raw = i2c_r32(mis); -+ PRINTK("i_raw 0x%08X\n", i_raw); -+ -+ /* error interrupt */ -+ if (i_raw & I2C_RIS_I2C_ERR_INT_INTOCC) { -+ i_err = i2c_r32(err_irqss); -+ PRINTK("i_err 0x%08X bus_stat 0x%04X\n", -+ i_err, i2c_r32(bus_stat)); -+ -+ /* tx fifo overflow (8) */ -+ if (i_err & I2C_ERR_IRQSS_TXF_OFL) -+ priv->msg_err |= FALCON_I2C_TX_OFL; -+ -+ /* tx fifo underflow (4) */ -+ if (i_err & I2C_ERR_IRQSS_TXF_UFL) -+ priv->msg_err |= FALCON_I2C_TX_UFL; -+ -+ /* rx fifo overflow (2) */ -+ if (i_err & I2C_ERR_IRQSS_RXF_OFL) -+ priv->msg_err |= FALCON_I2C_RX_OFL; -+ -+ /* rx fifo underflow (1) */ -+ if (i_err & I2C_ERR_IRQSS_RXF_UFL) -+ priv->msg_err |= FALCON_I2C_RX_UFL; -+ -+ i2c_w32(i_err, err_irqsc); -+ } -+ -+ /* protocol interrupt */ -+ if (i_raw & I2C_RIS_I2C_P_INT_INTOCC) -+ falcon_i2c_isr_prot(priv); -+ -+ if ((priv->msg_err) || (priv->status == STATUS_STOP)) -+ complete(&priv->cmd_complete); -+ -+ return IRQ_HANDLED; -+} -+ -+static u32 falcon_i2c_functionality(struct i2c_adapter *adap) -+{ -+ return I2C_FUNC_I2C | -+ I2C_FUNC_10BIT_ADDR | -+ I2C_FUNC_SMBUS_EMUL; -+} -+ -+static struct i2c_algorithm falcon_i2c_algorithm = { -+ .master_xfer = falcon_i2c_xfer, -+ .functionality = falcon_i2c_functionality, -+}; -+ -+static int __devinit falcon_i2c_probe(struct platform_device *pdev) -+{ -+ int ret = 0; -+ struct falcon_i2c *priv; -+ struct i2c_adapter *adap; -+ struct resource *mmres, *ioarea, -+ *irqres_lb, *irqres_b, *irqres_err, *irqres_p; -+ struct clk *clk; -+ -+ dev_dbg(&pdev->dev, "probing\n"); -+ -+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ irqres_lb = platform_get_resource_byname(pdev, IORESOURCE_IRQ, -+ "i2c_lb"); -+ irqres_b = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "i2c_b"); -+ irqres_err = platform_get_resource_byname(pdev, IORESOURCE_IRQ, -+ "i2c_err"); -+ irqres_p = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "i2c_p"); -+ -+ if (!mmres || !irqres_lb || !irqres_b || !irqres_err || !irqres_p) { -+ dev_err(&pdev->dev, "no resources\n"); -+ return -ENODEV; -+ } -+ -+ clk = clk_get_fpi(); -+ if (IS_ERR(clk)) { -+ dev_err(&pdev->dev, "failed to get fpi clk\n"); -+ return -ENOENT; -+ } -+ -+ if (clk_get_rate(clk) != 100000000) { -+ dev_err(&pdev->dev, "input clock is not 100MHz\n"); -+ return -ENOENT; -+ } -+ clk = clk_get(&pdev->dev, NULL); -+ if (IS_ERR(clk)) { -+ dev_err(&pdev->dev, "failed to get i2c clk\n"); -+ return -ENOENT; -+ } -+ -+ /* allocate private data */ -+ priv = kzalloc(sizeof(*priv), GFP_KERNEL); -+ if (!priv) { -+ dev_err(&pdev->dev, "can't allocate private data\n"); -+ return -ENOMEM; -+ } -+ -+ adap = &priv->adap; -+ i2c_set_adapdata(adap, priv); -+ adap->owner = THIS_MODULE; -+ adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; -+ strlcpy(adap->name, DRV_NAME "-adapter", sizeof(adap->name)); -+ adap->algo = &falcon_i2c_algorithm; -+ -+ priv->mode = FALCON_I2C_MODE_100; -+ priv->clk = clk; -+ priv->dev = &pdev->dev; -+ -+ init_completion(&priv->cmd_complete); -+ mutex_init(&priv->mutex); -+ -+ if (ltq_gpio_request(&pdev->dev, 107, 0, 0, DRV_NAME":sda") || -+ ltq_gpio_request(&pdev->dev, 108, 0, 0, DRV_NAME":scl")) -+ { -+ dev_err(&pdev->dev, "I2C gpios not available\n"); -+ ret = -ENXIO; -+ goto err_free_priv; -+ } -+ -+ ioarea = request_mem_region(mmres->start, resource_size(mmres), -+ pdev->name); -+ -+ if (ioarea == NULL) { -+ dev_err(&pdev->dev, "I2C region already claimed\n"); -+ ret = -ENXIO; -+ goto err_free_gpio; -+ } -+ -+ /* map memory */ -+ priv->membase = ioremap_nocache(mmres->start & ~KSEG1, -+ resource_size(mmres)); -+ if (priv->membase == NULL) { -+ ret = -ENOMEM; -+ goto err_release_region; -+ } -+ -+ priv->irq_lb = irqres_lb->start; -+ ret = request_irq(priv->irq_lb, falcon_i2c_isr_burst, IRQF_DISABLED, -+ irqres_lb->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get last burst IRQ %d\n", -+ irqres_lb->start); -+ ret = -ENODEV; -+ goto err_unmap_mem; -+ } -+ -+ priv->irq_b = irqres_b->start; -+ ret = request_irq(priv->irq_b, falcon_i2c_isr_burst, IRQF_DISABLED, -+ irqres_b->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get burst IRQ %d\n", -+ irqres_b->start); -+ ret = -ENODEV; -+ goto err_free_lb_irq; -+ } -+ -+ priv->irq_err = irqres_err->start; -+ ret = request_irq(priv->irq_err, falcon_i2c_isr, IRQF_DISABLED, -+ irqres_err->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get error IRQ %d\n", -+ irqres_err->start); -+ ret = -ENODEV; -+ goto err_free_b_irq; -+ } -+ -+ priv->irq_p = irqres_p->start; -+ ret = request_irq(priv->irq_p, falcon_i2c_isr, IRQF_DISABLED, -+ irqres_p->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get protocol IRQ %d\n", -+ irqres_p->start); -+ ret = -ENODEV; -+ goto err_free_err_irq; -+ } -+ -+ dev_dbg(&pdev->dev, "mapped io-space to %p\n", priv->membase); -+ dev_dbg(&pdev->dev, "use IRQs %d, %d, %d, %d\n", irqres_lb->start, -+ irqres_b->start, irqres_err->start, irqres_p->start); -+ -+ /* add our adapter to the i2c stack */ -+ ret = i2c_add_numbered_adapter(adap); -+ if (ret) { -+ dev_err(&pdev->dev, "can't register I2C adapter\n"); -+ goto err_free_p_irq; -+ } -+ -+ platform_set_drvdata(pdev, priv); -+ i2c_set_adapdata(adap, priv); -+ -+ /* print module version information */ -+ dev_dbg(&pdev->dev, "module id=%u revision=%u\n", -+ (i2c_r32(id) & I2C_ID_ID_MASK) >> I2C_ID_ID_OFFSET, -+ (i2c_r32(id) & I2C_ID_REV_MASK) >> I2C_ID_REV_OFFSET); -+ -+ /* initialize HW */ -+ ret = falcon_i2c_hw_init(adap); -+ if (ret) { -+ dev_err(&pdev->dev, "can't configure adapter\n"); -+ goto err_remove_adapter; -+ } -+ -+ dev_info(&pdev->dev, "version %s\n", DRV_VERSION); -+ -+ return 0; -+ -+err_remove_adapter: -+ i2c_del_adapter(adap); -+ platform_set_drvdata(pdev, NULL); -+ -+err_free_p_irq: -+ free_irq(priv->irq_p, priv); -+ -+err_free_err_irq: -+ free_irq(priv->irq_err, priv); -+ -+err_free_b_irq: -+ free_irq(priv->irq_b, priv); -+ -+err_free_lb_irq: -+ free_irq(priv->irq_lb, priv); -+ -+err_unmap_mem: -+ iounmap(priv->membase); -+ -+err_release_region: -+ release_mem_region(mmres->start, resource_size(mmres)); -+ -+err_free_gpio: -+ gpio_free(108); -+ gpio_free(107); -+ -+err_free_priv: -+ kfree(priv); -+ -+ return ret; -+} -+ -+static int __devexit falcon_i2c_remove(struct platform_device *pdev) -+{ -+ struct falcon_i2c *priv = platform_get_drvdata(pdev); -+ struct resource *mmres; -+ -+ /* disable bus */ -+ i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl); -+ -+ /* remove driver */ -+ platform_set_drvdata(pdev, NULL); -+ i2c_del_adapter(&priv->adap); -+ -+ free_irq(priv->irq_lb, priv); -+ free_irq(priv->irq_b, priv); -+ free_irq(priv->irq_err, priv); -+ free_irq(priv->irq_p, priv); -+ -+ iounmap(priv->membase); -+ -+ gpio_free(108); -+ gpio_free(107); -+ -+ kfree(priv); -+ -+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ release_mem_region(mmres->start, resource_size(mmres)); -+ -+ dev_dbg(&pdev->dev, "removed\n"); -+ -+ return 0; -+} -+ -+static struct platform_driver falcon_i2c_driver = { -+ .probe = falcon_i2c_probe, -+ .remove = __devexit_p(falcon_i2c_remove), -+ .driver = { -+ .name = DRV_NAME, -+ .owner = THIS_MODULE, -+ }, -+}; -+ -+static int __init falcon_i2c_init(void) -+{ -+ int ret; -+ -+ ret = platform_driver_register(&falcon_i2c_driver); -+ -+ if (ret) -+ pr_debug(DRV_NAME ": can't register platform driver\n"); -+ -+ return ret; -+} -+ -+static void __exit falcon_i2c_exit(void) -+{ -+ platform_driver_unregister(&falcon_i2c_driver); -+} -+ -+module_init(falcon_i2c_init); -+module_exit(falcon_i2c_exit); -+ -+MODULE_DESCRIPTION("Lantiq FALC(tm) ON - I2C bus adapter"); -+MODULE_ALIAS("platform:" DRV_NAME); -+MODULE_LICENSE("GPL"); -+MODULE_VERSION(DRV_VERSION); |