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-rw-r--r--target/linux/coldfire/patches/025-Add-I2C-driver-for-MCF5445x-MCF547x-MCF548x.patch1216
1 files changed, 0 insertions, 1216 deletions
diff --git a/target/linux/coldfire/patches/025-Add-I2C-driver-for-MCF5445x-MCF547x-MCF548x.patch b/target/linux/coldfire/patches/025-Add-I2C-driver-for-MCF5445x-MCF547x-MCF548x.patch
deleted file mode 100644
index 743af7f..0000000
--- a/target/linux/coldfire/patches/025-Add-I2C-driver-for-MCF5445x-MCF547x-MCF548x.patch
+++ /dev/null
@@ -1,1216 +0,0 @@
-From a7c7130d916c1f7e0d27ad9b338912496ad53089 Mon Sep 17 00:00:00 2001
-From: Alison Wang <b18965@freescale.com>
-Date: Thu, 4 Aug 2011 09:59:46 +0800
-Subject: [PATCH 25/52] Add I2C driver for MCF5445x/MCF547x/MCF548x.
-
-Add common I2C driver for MCF5445x/MCF547x/MCF548x and add I2C slave
-mode support for MCF5445x.
-
-Configure I2C adaptor as slave mode and Support I2C adaptor as a
-"eeprom-like" slave device.
-
-Signed-off-by: Alison Wang <b18965@freescale.com>
----
- arch/m68k/include/asm/mcfi2c.h | 57 +++
- drivers/i2c/busses/Kconfig | 24 ++
- drivers/i2c/busses/Makefile | 2 +
- drivers/i2c/busses/i2c-algo-mcf.h | 23 ++
- drivers/i2c/busses/i2c-mcf-slave.c | 358 ++++++++++++++++++
- drivers/i2c/busses/i2c-mcf.c | 698 ++++++++++++++++++++++++++++++++++++
- 6 files changed, 1162 insertions(+), 0 deletions(-)
- create mode 100644 arch/m68k/include/asm/mcfi2c.h
- create mode 100644 drivers/i2c/busses/i2c-algo-mcf.h
- create mode 100644 drivers/i2c/busses/i2c-mcf-slave.c
- create mode 100644 drivers/i2c/busses/i2c-mcf.c
-
---- /dev/null
-+++ b/arch/m68k/include/asm/mcfi2c.h
-@@ -0,0 +1,57 @@
-+/*
-+ * mcfi2c.h -- ColdFire mcfv4/mcfv4e i2c controller support.
-+ * Copyright (C) 2009-2011 Freescale Semiconductor, Inc. All Rights Reserved.
-+ */
-+#ifndef MCF_I2C_H
-+#define MCF_I2C_H
-+
-+/* Register read/write macros */
-+#if defined(CONFIG_M547X_8X)
-+#define MCF_I2AR MCF_REG08(0x008F00) /* I2C Address */
-+#define MCF_I2FDR MCF_REG08(0x008F04) /* I2C Frequency Divider */
-+#define MCF_I2CR MCF_REG08(0x008F08) /* I2C Control */
-+#define MCF_I2SR MCF_REG08(0x008F0C) /* I2C Status */
-+#define MCF_I2DR MCF_REG08(0x008F10) /* I2C Data I/O */
-+#define MCF_I2ICR MCF_REG08(0x008F20) /* I2C Interrupt Control */
-+#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
-+#define MCF_I2AR (*(volatile u8 *)(0xFC058000)) /* I2C Address */
-+/* I2C Frequency Divider */
-+#define MCF_I2FDR (*(volatile u8 *)(0xFC058004))
-+#define MCF_I2CR (*(volatile u8 *)(0xFC058008)) /* I2C Control */
-+#define MCF_I2SR (*(volatile u8 *)(0xFC05800C)) /* I2C Status */
-+#define MCF_I2DR (*(volatile u8 *)(0xFC058010)) /* I2C Data I/O */
-+#endif
-+
-+/* Bit definitions and macros for MCF_I2C_I2AR */
-+#define MCF_I2AR_ADR(x) (((x)&0x7F)<<1)
-+
-+/* Bit definitions and macros for MCF_I2C_I2FDR */
-+#define MCF_I2FDR_IC(x) (((x)&0x3F)<<0)
-+
-+/* Bit definitions and macros for MCF_I2C_I2CR */
-+#define MCF_I2CR_RSTA (0x04)
-+#define MCF_I2CR_TXAK (0x08)
-+#define MCF_I2CR_MTX (0x10)
-+#define MCF_I2CR_MSTA (0x20)
-+#define MCF_I2CR_IIEN (0x40)
-+#define MCF_I2CR_IEN (0x80)
-+
-+/* Bit definitions and macros for MCF_I2C_I2SR */
-+#define MCF_I2SR_RXAK (0x01)
-+#define MCF_I2SR_IIF (0x02)
-+#define MCF_I2SR_SRW (0x04)
-+#define MCF_I2SR_IAL (0x10)
-+#define MCF_I2SR_IBB (0x20)
-+#define MCF_I2SR_IAAS (0x40)
-+#define MCF_I2SR_ICF (0x80)
-+
-+/* Bit definitions and macros for MCF_I2C_I2ICR */
-+#if defined(CONFIG_M547X_8X)
-+#define MCF_I2ICR_IE (0x01)
-+#define MCF_I2ICR_RE (0x02)
-+#define MCF_I2ICR_TE (0x04)
-+#define MCF_I2ICR_BNBE (0x08)
-+#endif
-+
-+/********************************************************************/
-+#endif
---- a/drivers/i2c/busses/Kconfig
-+++ b/drivers/i2c/busses/Kconfig
-@@ -431,6 +431,30 @@ config I2C_IXP2000
- This driver is deprecated and will be dropped soon. Use i2c-gpio
- instead.
-
-+config I2C_MCF
-+ tristate "MCF ColdFire I2C Interface"
-+ depends on I2C && COLDFIRE
-+ help
-+ If you say yes to this option, support will be included for the
-+ I2C on most ColdFire CPUs
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called i2c-mcf.
-+
-+config I2C_MCF_SLAVE
-+ tristate "MCF ColdFire I2C Slave Interface"
-+ depends on !(I2C_MCF)
-+ default n
-+ help
-+ mcf i2c adapter slave mode, only supported on mcf5445x platform.
-+
-+config I2C_SLAVE_TEST
-+ bool "I2C Slave Mode Test Configuration"
-+ depends on I2C_MCF_SLAVE
-+ default y
-+ help
-+ This configuration help to test I2C slave mode
-+
- config I2C_MPC
- tristate "MPC107/824x/85xx/512x/52xx/83xx/86xx"
- depends on PPC32
---- a/drivers/i2c/busses/Makefile
-+++ b/drivers/i2c/busses/Makefile
-@@ -77,5 +77,7 @@ obj-$(CONFIG_I2C_SIBYTE) += i2c-sibyte.o
- obj-$(CONFIG_I2C_STUB) += i2c-stub.o
- obj-$(CONFIG_SCx200_ACB) += scx200_acb.o
- obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o
-+obj-$(CONFIG_I2C_MCF) += i2c-mcf.o
-+obj-$(CONFIG_I2C_MCF_SLAVE) += i2c-mcf-slave.o
-
- ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG
---- /dev/null
-+++ b/drivers/i2c/busses/i2c-algo-mcf.h
-@@ -0,0 +1,23 @@
-+#ifndef I2C_ALGO_MCF_H
-+#define I2C_ALGO_MCF_H 1
-+
-+/* --- Defines for pcf-adapters --------------------------------------- */
-+#include <linux/i2c.h>
-+
-+struct i2c_algo_mcf_data {
-+ void *data; /* private data for lolevel routines */
-+ void (*setmcf) (void *data, int ctl, int val);
-+ int (*getmcf) (void *data, int ctl);
-+ int (*getown) (void *data);
-+ int (*getclock) (void *data);
-+ void (*waitforpin) (void);
-+ /* local settings */
-+ int udelay;
-+ int mdelay;
-+ int timeout;
-+};
-+
-+int i2c_mcf_add_bus(struct i2c_adapter *);
-+int i2c_mcf_del_bus(struct i2c_adapter *);
-+
-+#endif /* I2C_ALGO_MCF_H */
---- /dev/null
-+++ b/drivers/i2c/busses/i2c-mcf-slave.c
-@@ -0,0 +1,358 @@
-+/*
-+ * i2c-mcf-slave.c - support adpater slave mode, now only support
-+ * mcf5445x platform
-+ *
-+ * Copyright (C) 2009-2011 Freescale Semiconductor, Inc. All Rights Reserved.
-+ * Lanttor Guo <lanttor.guo@freescale.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.
-+*/
-+
-+#ifdef CONFIG_I2C_SLAVE_TEST
-+#define DEBUG
-+#endif
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/kernel.h>
-+#include <linux/errno.h>
-+#include <linux/i2c.h>
-+#include <linux/delay.h>
-+#include <linux/string.h>
-+#include <linux/platform_device.h>
-+#include <linux/interrupt.h>
-+#include <linux/proc_fs.h>
-+#include <linux/types.h>
-+#include <asm/coldfire.h>
-+#include <asm/mcfsim.h>
-+#include <asm/irq.h>
-+#include <asm/mcfi2c.h>
-+#if defined(CONFIG_M5445X)
-+#include <asm/mcf5445x_intc.h>
-+#endif
-+
-+#define IRQ (64+30)
-+#define SLAVE_HANDLER_NAME "mcf-i2c slave handler"
-+#define I2C_BUFFER_SIZE 50
-+
-+/* Structure for storing I2C transfer data */
-+struct i2c_buffer {
-+ int tx_index; /* TX index */
-+ int rx_index; /* RX index */
-+ u16 length; /* Length of the buffer in bytes */
-+ u8 buf[I2C_BUFFER_SIZE]; /* Data buffer */
-+};
-+
-+struct i2c_buffer i2c_tx_buffer;
-+struct i2c_buffer i2c_rx_buffer;
-+
-+u8 *tx_string = "abcdefghijklmnopqrstuvwxyz0123456789)!@#$%^&*([].";
-+
-+/*
-+ * I2C slave mode interrupt handler
-+ *
-+ */
-+static irqreturn_t i2c_slave_handler(int this_irq, void *dev_id)
-+{
-+ u8 dummy_read;
-+ int tmp_index;
-+
-+#ifdef DEBUG
-+ printk(KERN_INFO "i2c adapter slave mode irq handler.\n");
-+#endif
-+
-+ /* Clear I2C interupt flag */
-+ MCF_I2SR = ~MCF_I2SR_IIF;
-+
-+ /* Check if this device is in Master or Slave Mode. */
-+ if (MCF_I2CR & MCF_I2CR_MSTA) {
-+ /* Master mode, do nothing here */
-+ printk(KERN_INFO "i2c master mode at %s(), do nothing!\n",
-+ __func__);
-+ return IRQ_NONE;
-+ } else {
-+ /* Slave Mode - Check if Arbitration Lost. */
-+ if (MCF_I2SR & MCF_I2SR_IAL) {
-+
-+ #ifdef DEBUG
-+ printk(KERN_INFO "Arbitration Lost.\n");
-+ #endif
-+
-+ /* Clear IAL bit */
-+ MCF_I2SR &= ~MCF_I2SR_IAL;
-+
-+ /* Arbitration Lost -
-+ * Check if this device is being addressed as slave.
-+ *(If not, nothing more needs to be done.)
-+ */
-+ if (MCF_I2SR & MCF_I2SR_IAAS) {
-+ /* Addressed as slave -
-+ * Check if master was reading from slave or
-+ * writing to slave.
-+ */
-+ if (MCF_I2SR & MCF_I2SR_SRW) {
-+ /* Set tx_index to 0 */
-+ if (i2c_tx_buffer.length == 0) {
-+ i2c_tx_buffer.length =
-+ I2C_BUFFER_SIZE;
-+ i2c_tx_buffer.tx_index = 0;
-+ }
-+
-+ /* Master was reading from slave -
-+ * Set Transmit Mode.
-+ */
-+ MCF_I2CR |= MCF_I2CR_MTX;
-+
-+ /* Write data to MBDR. */
-+ tmp_index = i2c_tx_buffer.tx_index++;
-+ MCF_I2DR = i2c_tx_buffer.buf[tmp_index];
-+ i2c_tx_buffer.length--;
-+
-+ #ifdef DEBUG
-+ printk(KERN_INFO "Arbitration Lost: "
-+ "Addressed as slave - "
-+ "TX mode.\n");
-+ #endif
-+ } else {
-+ /* Set rx_index to 0 */
-+ i2c_rx_buffer.rx_index = 0;
-+
-+ /* Master was writing to slave -
-+ Set Receive Mode. */
-+ MCF_I2CR &= ~MCF_I2CR_MTX;
-+
-+ /* Dummy read from MBDR, to clear
-+ the ICF bit. */
-+ dummy_read = MCF_I2DR;
-+
-+ #ifdef DEBUG
-+ printk(KERN_INFO "Arbitration Lost: "
-+ "Addressed as slave - "
-+ "RX mode.\n");
-+ #endif
-+ }
-+ }
-+
-+ } else {
-+ /* Arbitration Not Lost - Check if data byte is this
-+ devices's Slave Address byte. */
-+ if (MCF_I2SR & MCF_I2SR_IAAS) {
-+ /* Data byte is Slave Address byte -
-+ Check Slave Read/Write bit. */
-+ if (MCF_I2SR & MCF_I2SR_SRW) {
-+ /* Set tx_index to 0 */
-+ if (i2c_tx_buffer.length == 0) {
-+ i2c_tx_buffer.length =
-+ I2C_BUFFER_SIZE;
-+ i2c_tx_buffer.tx_index = 0;
-+ }
-+
-+ /* Master was reading from slave -
-+ Set Transmit Mode. */
-+ MCF_I2CR |= MCF_I2CR_MTX;
-+
-+ /* Write data to MBDR. */
-+ tmp_index = i2c_tx_buffer.tx_index++;
-+ MCF_I2DR = i2c_tx_buffer.buf[tmp_index];
-+ i2c_tx_buffer.length--;
-+
-+ #ifdef DEBUG
-+ tmp_index = i2c_tx_buffer.tx_index - 1;
-+ printk(KERN_INFO "Slave TX: First byte"
-+ " - 0x%02X\n",
-+ i2c_tx_buffer.buf[tmp_index]);
-+ #endif
-+ } else {
-+ /* Master has specified Slave Receive
-+ Mode. Set Receive Mode. (Writing to
-+ MBCR clears IAAS.) */
-+
-+ /* Set rx_index to 0 */
-+ i2c_rx_buffer.rx_index = 0;
-+
-+ MCF_I2CR &= ~MCF_I2CR_MTX;
-+
-+ /* Dummy read from MBDR, to clear
-+ the ICF bit. */
-+ dummy_read = MCF_I2DR;
-+
-+ #ifdef DEBUG
-+ printk(KERN_INFO "Slave RX: Receive "
-+ "address.\n");
-+ #endif
-+ }
-+ } else {
-+ /* Data byte received is not Slave Address byte
-+ Check if this device is in Transmit or
-+ Receive Mode. */
-+ if (MCF_I2CR & MCF_I2CR_MTX) {
-+ /* Last byte received? */
-+ if (MCF_I2SR & MCF_I2SR_RXAK) {
-+ MCF_I2CR &= ~MCF_I2CR_MTX;
-+ dummy_read = MCF_I2DR;
-+
-+ #ifdef DEBUG
-+ printk(KERN_INFO "Slave TX: "
-+ "Last byte has been "
-+ "sent.\n");
-+ #endif
-+ } else {
-+ /* Write data to MBDR. */
-+ tmp_index =
-+ i2c_tx_buffer.tx_index++;
-+ MCF_I2DR =
-+ i2c_tx_buffer.buf[tmp_index];
-+ i2c_tx_buffer.length--;
-+
-+ if (i2c_tx_buffer.length == 0) {
-+ i2c_tx_buffer.length =
-+ I2C_BUFFER_SIZE;
-+ i2c_tx_buffer.tx_index =
-+ 0;
-+ }
-+
-+ }
-+ } else {
-+ /* Receive Mode - Read data from
-+ MBDR and store it. */
-+ tmp_index = i2c_rx_buffer.rx_index++;
-+ i2c_rx_buffer.buf[tmp_index] = MCF_I2DR;
-+ i2c_rx_buffer.length++;
-+ }
-+ }
-+ }
-+ return IRQ_HANDLED;
-+ }
-+}
-+
-+#ifdef CONFIG_PROC_FS
-+
-+/*
-+ * Info exported via "/proc/driver/i2c".
-+ */
-+
-+static int gen_i2c_proc_output(char *buf)
-+{
-+ char *p;
-+
-+ p = buf;
-+ p += sprintf(p,
-+ "I2CR: 0x%x\n"
-+ "I2SR: 0x%x\n"
-+ "I2DR: 0x%x\n",
-+ MCF_I2CR, MCF_I2SR, MCF_I2DR);
-+
-+ return p - buf;
-+}
-+
-+static int gen_i2c_read_proc(char *page, char **start, off_t off,
-+ int count, int *eof, void *data)
-+{
-+ int len = gen_i2c_proc_output(page);
-+ if (len <= off+count)
-+ *eof = 1;
-+ *start = page + off;
-+ len -= off;
-+ if (len > count)
-+ len = count;
-+ if (len < 0)
-+ len = 0;
-+ return len;
-+}
-+
-+static int __init gen_i2c_proc_init(void)
-+{
-+ struct proc_dir_entry *r;
-+
-+ r = create_proc_read_entry("driver/i2c-adaptor-register", 0, NULL,
-+ gen_i2c_read_proc, NULL);
-+ if (!r)
-+ return -ENOMEM;
-+ return 0;
-+}
-+#else
-+static inline int gen_i2c_proc_init(void) { return 0; }
-+#endif /* CONFIG_PROC_FS */
-+
-+/*
-+ * Initalize I2C module
-+ */
-+static int __init i2c_coldfire_init(void)
-+{
-+ int retval;
-+ u8 dummy_read;
-+
-+#ifdef DEBUG
-+ printk(KERN_INFO "init i2c adaptor slave mode!\n");
-+#endif
-+
-+ /* Initialize the tx buffer */
-+ strcpy((char *)&i2c_tx_buffer.buf, (const char *)tx_string);
-+ i2c_tx_buffer.length = I2C_BUFFER_SIZE;
-+
-+#if defined(CONFIG_M5445X)
-+ /*
-+ * Initialize the GPIOs for I2C
-+ */
-+ MCF_GPIO_PAR_FECI2C |= (0
-+ | MCF_GPIO_PAR_FECI2C_PAR_SDA(3)
-+ | MCF_GPIO_PAR_FECI2C_PAR_SCL(3));
-+#endif
-+
-+ /* Set transmission frequency 0x19 = ~100kHz */
-+ MCF_I2FDR = 0x19;
-+
-+ /* set the I2C slave address */
-+ MCF_I2AR = 0x6A;
-+
-+ /* Enable I2C module and if IBB is set, do the special initialzation */
-+ /* procedures as are documented */
-+
-+ if ((MCF_I2SR & MCF_I2SR_IBB) == 1) {
-+ printk(KERN_INFO "%s - do special I2C init procedures\n",
-+ __func__);
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0xA0;
-+ dummy_read = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ }
-+
-+ MCF_I2CR |= (MCF_I2CR_IEN | MCF_I2CR_IIEN);
-+
-+ /* default I2C mode is - slave and receive */
-+ MCF_I2CR &= ~(MCF_I2CR_MSTA | MCF_I2CR_MTX);
-+
-+ retval = request_irq(IRQ, i2c_slave_handler, IRQF_DISABLED,
-+ SLAVE_HANDLER_NAME, NULL);
-+ if (retval < 0)
-+ printk(KERN_INFO "request_irq for i2c slave mode failed!\n");
-+
-+ retval = gen_i2c_proc_init();
-+
-+ if (retval < 0)
-+ printk(KERN_INFO "gen /proc/i2c-adaptor-register for i2c slave mode failed!\n");
-+
-+ return retval;
-+};
-+
-+/*
-+ * I2C module exit function
-+ */
-+
-+static void __exit i2c_coldfire_exit(void)
-+{
-+ /* disable I2C and Interrupt */
-+ MCF_I2CR &= ~(MCF_I2CR_IEN | MCF_I2CR_IIEN);
-+ free_irq(IRQ, NULL);
-+
-+};
-+
-+MODULE_DESCRIPTION("MCF5445x I2C adaptor slave mode support");
-+MODULE_LICENSE("GPL");
-+
-+module_init(i2c_coldfire_init);
-+module_exit(i2c_coldfire_exit);
---- /dev/null
-+++ b/drivers/i2c/busses/i2c-mcf.c
-@@ -0,0 +1,698 @@
-+/*
-+ * Copyright (C) 2009-2011 Freescale Semiconductor, Inc. All Rights Reserved.
-+ * Lanttor.Guo@freescale.com
-+ *
-+ * I2C bus driver on mcfv4/mcfv4e platform
-+ *
-+ * 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.
-+ */
-+#include <linux/i2c.h>
-+#include "i2c-algo-mcf.h"
-+
-+#include <linux/init.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/delay.h>
-+#include <linux/platform_device.h>
-+#include <linux/sched.h>
-+#include <linux/interrupt.h>
-+#include <linux/io.h>
-+#include <linux/proc_fs.h>
-+
-+#include <asm/coldfire.h>
-+#include <asm/mcfi2c.h>
-+
-+#if defined(CONFIG_M547X_8X)
-+#include <asm/m5485sim.h>
-+#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
-+#include <asm/mcfsim.h>
-+#endif
-+
-+#define get_clock(adap) (clock)
-+#define get_own(adap) (own)
-+
-+#if defined(CONFIG_M547X_8X)
-+static int clock = 0x3b;
-+#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
-+static int clock = 0x19;
-+#endif
-+module_param(clock, int, 0);
-+MODULE_PARM_DESC(clock,
-+ "Set I2C clock in kHz: 400=fast mode (default == 100khz)");
-+
-+static int own = 0x78;
-+module_param(own, int, 0);
-+MODULE_PARM_DESC(clock, "Set I2C Master controller address");
-+
-+static struct i2c_algo_mcf_data i2c_mcf_board_data = {
-+ .timeout = 10000,
-+};
-+
-+static struct i2c_adapter i2c_mcf_board_adapter = {
-+ .owner = THIS_MODULE,
-+ .name = "mcf i2c adapter",
-+ .algo_data = &i2c_mcf_board_data,
-+ .class = I2C_CLASS_HWMON,
-+ .timeout = 100,
-+ .retries = 2
-+};
-+/*
-+ * static void i2c_start()
-+ *
-+ * Generates START signal
-+ */
-+static void
-+i2c_start(
-+ struct i2c_algo_mcf_data *adap
-+) {
-+ MCF_I2CR |= MCF_I2CR_MSTA;
-+}
-+
-+
-+/*
-+ * static void i2c_stop()
-+ *
-+ * Generates STOP signal
-+ */
-+static void
-+i2c_stop(
-+ struct i2c_algo_mcf_data *adap
-+) {
-+ MCF_I2CR &= ~MCF_I2CR_MSTA;
-+}
-+
-+static int
-+i2c_getack(
-+ struct i2c_algo_mcf_data *adap
-+) {
-+ return !(MCF_I2SR & MCF_I2SR_RXAK);
-+}
-+
-+/*
-+ * static void wait_for_bb()
-+ *
-+ * Wait for bus idle state
-+ */
-+static int
-+wait_for_bb(
-+ struct i2c_algo_mcf_data *adap
-+) {
-+ int i;
-+ for (i = 0; i < adap->timeout; i++) {
-+ if (!(MCF_I2SR & MCF_I2SR_IBB))
-+ return 0;
-+ udelay(100);
-+ }
-+ printk(KERN_ERR "%s: timeout", __func__);
-+ return -ETIMEDOUT;
-+}
-+
-+/*
-+ * static void wait_for_not_bb()
-+ *
-+ * Wait for bus busy state
-+ */
-+static int
-+wait_for_not_bb(
-+ struct i2c_algo_mcf_data *adap
-+) {
-+ int i;
-+ for (i = 0; i < adap->timeout; i++) {
-+ if (MCF_I2SR & MCF_I2SR_IBB)
-+ return 0;
-+ udelay(100);
-+ }
-+ printk(KERN_ERR "%s: timeout", __func__);
-+ return -ETIMEDOUT;
-+}
-+
-+/*
-+ * static void wait_xfer_done()
-+ *
-+ * Wait for transfer to complete
-+ */
-+static int
-+wait_xfer_done(
-+ struct i2c_algo_mcf_data *adap
-+) {
-+ int i;
-+
-+ for (i = 0; i < adap->timeout; i++) {
-+ if (MCF_I2SR & MCF_I2SR_IIF) {
-+ MCF_I2SR &= ~MCF_I2SR_IIF;
-+ return 0;
-+ }
-+ udelay(10);
-+ }
-+ printk(KERN_ERR "%s: timeout", __func__);
-+ return -ETIMEDOUT;
-+}
-+
-+
-+/*
-+ * static void i2c_set_addr()
-+ *
-+ * Sets slave address to communicate
-+ */
-+static int
-+i2c_set_addr(
-+ struct i2c_algo_mcf_data *adap,
-+ struct i2c_msg *msg,
-+ int retries
-+) {
-+ unsigned short flags = msg->flags;
-+ unsigned char addr;
-+ MCF_I2CR |= MCF_I2CR_MTX;
-+ if ((flags & I2C_M_TEN)) {
-+ /* 10 bit address not supported yet */
-+ return -EIO;
-+ } else {
-+ /* normal 7bit address */
-+ addr = (msg->addr << 1);
-+ if (flags & I2C_M_RD)
-+ addr |= 1;
-+ if (flags & I2C_M_REV_DIR_ADDR)
-+ addr ^= 1;
-+
-+ MCF_I2DR = addr;
-+ }
-+ return 0;
-+}
-+
-+
-+/*
-+ * static void mcf_i2c_init()
-+ *
-+ * Perform ColdFire i2c initialization
-+ */
-+static void
-+mcf_i2c_init(struct i2c_algo_mcf_data *adap)
-+{
-+ u8 dummy;
-+
-+ /* Setup GPIO lines */
-+#if defined(CONFIG_M547X_8X)
-+ MCF_PAR_FECI2CIRQ |= MCF_PAR_SDA;
-+ MCF_PAR_FECI2CIRQ |= MCF_PAR_SCL;
-+#elif defined(CONFIG_M5445X)
-+ MCF_GPIO_PAR_FECI2C |= (0
-+ | MCF_GPIO_PAR_FECI2C_PAR_SDA(3)
-+ | MCF_GPIO_PAR_FECI2C_PAR_SCL(3));
-+#elif defined(CONFIG_M5441X)
-+ MCF_GPIO_PAR_CANI2C =
-+ (MCF_GPIO_PAR_CANI2C & MCF_GPIO_PAR_CANI2C_I2C0SCL_MASK) |
-+ MCF_GPIO_PAR_CANI2C_I2C0SCL_I2C0SCL;
-+ MCF_GPIO_PAR_CANI2C =
-+ (MCF_GPIO_PAR_CANI2C & MCF_GPIO_PAR_CANI2C_I2C0SDA_MASK) |
-+ MCF_GPIO_PAR_CANI2C_I2C0SDA_I2C0SDA;
-+#endif
-+
-+ /* Ensure slaves are in idle state */
-+ if (MCF_I2SR & MCF_I2SR_IBB) {
-+#if defined(CONFIG_M547X_8X)
-+ MCF_I2ICR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0x0A;
-+ dummy = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2ICR = 0x01;
-+#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0xA0;
-+ dummy = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0x80;
-+#endif
-+ }
-+
-+ /* setup SCL clock */
-+ MCF_I2FDR = get_clock(adap);
-+
-+ /* set slave address */
-+ MCF_I2AR = get_own(adap);
-+
-+ /* enable I2C module */
-+#if defined(CONFIG_M5441X)
-+ MCF_I2CR = (MCF_I2CR_IEN | MCF_I2CR_IIEN);
-+#else
-+ MCF_I2CR = MCF_I2CR_IEN;
-+#endif
-+}
-+
-+static int i2c_outb(
-+ struct i2c_adapter *i2c_adap,
-+ char c
-+) {
-+
-+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
-+ int timeout;
-+ /* Put data to be sent */
-+ MCF_I2DR = c;
-+ /* Wait for xfer completed*/
-+ timeout = wait_xfer_done(adap);
-+ if (timeout) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ printk(KERN_ERR "i2c-algo-mcf: %s i2c_write: "
-+ "error - timeout.\n", i2c_adap->name);
-+ return -EREMOTEIO; /* got a better one ?? */
-+ }
-+
-+ return 0;
-+}
-+
-+
-+/*
-+ * static void mcf_sendbytes()
-+ *
-+ * Perform tx data transfer
-+ */
-+static int
-+mcf_sendbytes(
-+ struct i2c_adapter *i2c_adap,
-+ const char *buf,
-+ int count, int last
-+) {
-+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
-+ int ret, i;
-+
-+ /* Set master TX mode */
-+ MCF_I2CR |= MCF_I2CR_MTX;
-+
-+ for (i = 0; i < count; ++i) {
-+ printk(KERN_DEBUG "i2c-algo-mcf: %s i2c_write: writing %2.2X\n",
-+ i2c_adap->name, buf[i]&0xff);
-+ ret = i2c_outb(i2c_adap, buf[i]);
-+ if (ret < 0)
-+ return ret;
-+ }
-+ if (last) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ } else {
-+ /* i2c_repstart(adap);*/
-+ }
-+
-+ return i;
-+}
-+
-+
-+/*
-+ * static void mcf_readbytes()
-+ *
-+ * Perform rx data transfer
-+ */
-+static int
-+mcf_readbytes(
-+ struct i2c_adapter *i2c_adap,
-+ char *buf,
-+ int count, int last
-+) {
-+ int i;
-+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
-+ u8 dummy;
-+
-+ /* Set master RX mode */
-+ MCF_I2CR &= ~MCF_I2CR_MTX;
-+ MCF_I2CR &= ~MCF_I2CR_TXAK;
-+ dummy = MCF_I2DR;
-+
-+ for (i = 0; i < count-1; i++) {
-+ if (wait_xfer_done(adap)) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ printk(KERN_DEBUG
-+ "i2c-algo-mcf: mcf_readbytes timed out.\n");
-+ return -1;
-+ }
-+
-+ /* store next data byte */
-+ buf[i] = MCF_I2DR;
-+ }
-+
-+ if (wait_xfer_done(adap)) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ printk(KERN_DEBUG "i2c-algo-mcf: mcf_readbytes timed out.\n");
-+ return -1;
-+ }
-+
-+ /* Disable acknowlege (set I2CR.TXAK) */
-+ MCF_I2CR |= MCF_I2CR_TXAK;
-+ buf[i] = MCF_I2DR;
-+ if (wait_xfer_done(adap)) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ printk(KERN_DEBUG "i2c-algo-mcf: mcf_readbytes timed out.\n");
-+ return -1;
-+ }
-+
-+ if (last) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ } else {
-+ /* i2c_repstart(adap);*/
-+ }
-+
-+ return i+1;
-+}
-+
-+
-+/*
-+ * static void mcf_xfer()
-+ *
-+ * Perform master data I/O transfer
-+ */
-+static int
-+mcf_xfer(
-+ struct i2c_adapter *i2c_adap,
-+ struct i2c_msg *msgs,
-+ int num)
-+{
-+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
-+ struct i2c_msg *pmsg;
-+ int i;
-+ int ret = 0, timeout;
-+
-+ /* Skip own address */
-+ if (get_own(adap) == (msgs[0].addr << 1))
-+ return -EIO;
-+
-+ /* Ensure slaves are in idle state */
-+ if (MCF_I2SR & MCF_I2SR_IBB) {
-+#if defined(CONFIG_M547X_8X)
-+ MCF_I2ICR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0x0A;
-+ timeout = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2ICR = 0x01;
-+#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0xA0;
-+ timeout = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0x80;
-+#endif
-+ }
-+
-+ /* setup SCL clock */
-+ MCF_I2FDR = get_clock(adap);
-+ /* set slave address */
-+ MCF_I2AR = get_own(adap);
-+ /* enable I2C module */
-+#if defined(CONFIG_M5441X)
-+ MCF_I2CR = (MCF_I2CR_IEN | MCF_I2CR_IIEN);
-+#else
-+ MCF_I2CR = MCF_I2CR_IEN;
-+#endif
-+ MCF_I2CR |= MCF_I2CR_TXAK;
-+
-+ /* Check for bus busy */
-+ wait_for_bb(adap);
-+
-+ for (i = 0; ret >= 0 && i < num; i++) {
-+ if (MCF_I2SR & MCF_I2SR_IBB) {
-+#if defined(CONFIG_M547X_8X)
-+ MCF_I2ICR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0x0A;
-+ timeout = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2ICR = 0x01;
-+#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0xA0;
-+ timeout = MCF_I2DR;
-+ MCF_I2SR = 0x00;
-+ MCF_I2CR = 0x00;
-+ MCF_I2CR = 0x80;
-+#endif
-+ }
-+ /* setup SCL clock */
-+ MCF_I2FDR = get_clock(adap);
-+ /* set slave address */
-+ MCF_I2AR = get_own(adap);
-+ /* enable I2C module */
-+#if defined(CONFIG_M5441X)
-+ MCF_I2CR = (MCF_I2CR_IEN | MCF_I2CR_IIEN);
-+#else
-+ MCF_I2CR = MCF_I2CR_IEN;
-+#endif
-+ MCF_I2CR |= MCF_I2CR_TXAK;
-+
-+ /* Check for bus busy */
-+ wait_for_bb(adap);
-+
-+ pmsg = &msgs[i];
-+
-+ printk(KERN_DEBUG "i2c-algo-mcf: Doing %s %d bytes "
-+ "to 0x%02x - %d of %d messages\n",
-+ pmsg->flags & I2C_M_RD ? "read" : "write",
-+ pmsg->len, pmsg->addr, i + 1, num);
-+
-+ /* Send START */
-+ /*if (i == 0)*/
-+ i2c_start(adap);
-+
-+ /* Wait for Bus Busy */
-+ wait_for_not_bb(adap);
-+
-+ MCF_I2CR |= MCF_I2CR_MTX;
-+
-+ ret = i2c_set_addr(adap, pmsg, i2c_adap->retries);
-+ if (ret < 0)
-+ return ret;
-+
-+ /* Wait for address transfer completion */
-+ wait_xfer_done(adap);
-+
-+ /* Check for ACK */
-+ if (!i2c_getack(adap)) {
-+ i2c_stop(adap);
-+ wait_for_bb(adap);
-+ printk(KERN_DEBUG "i2c-algo-mcf: No ack after "
-+ "send address in mcf_xfer\n");
-+ return -EREMOTEIO;
-+ }
-+
-+ printk(KERN_DEBUG "i2c-algo-mcf: Msg %d, "
-+ "addr = 0x%x, flags = 0x%x, len = %d\n",
-+ i, msgs[i].addr, msgs[i].flags, msgs[i].len);
-+ /* Read */
-+ if (pmsg->flags & I2C_M_RD) {
-+ /* read bytes into buffer*/
-+ ret = mcf_readbytes(i2c_adap, pmsg->buf, pmsg->len,
-+ (i + 1 == num));
-+
-+ if (ret != pmsg->len) {
-+ printk(KERN_DEBUG "i2c-algo-mcf: fail: "
-+ "only read %d bytes.\n", ret);
-+ } else {
-+ printk(KERN_DEBUG "i2c-algo-mcf: "
-+ "read %d bytes.\n", ret);
-+ }
-+ } else {
-+ /* write bytes into buffer*/
-+ ret = mcf_sendbytes(i2c_adap, pmsg->buf, pmsg->len,
-+ (i + 1 == num));
-+ if (ret != pmsg->len) {
-+ printk(KERN_DEBUG "i2c-algo-mcf: fail: "
-+ "only wrote %d bytes.\n", ret);
-+ } else {
-+ printk(KERN_DEBUG "i2c-algo-mcf: wrote"
-+ "%d bytes.\n", ret);
-+ }
-+ }
-+ MCF_I2CR = 0;
-+ }
-+
-+ /* Disable I2C module */
-+ MCF_I2CR = 0;
-+ return i;
-+}
-+
-+
-+/*
-+ * static void mcf_func()
-+ *
-+ * Return algorithm funtionality
-+ */
-+static u32
-+mcf_func(
-+ struct i2c_adapter *i2c_adap
-+) {
-+ return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
-+}
-+
-+/*
-+ * ColdFire bus algorithm callbacks
-+ */
-+static struct i2c_algorithm mcf_algo = {
-+ .master_xfer = mcf_xfer,
-+ .functionality = mcf_func,
-+};
-+
-+/***********************************************************/
-+struct coldfire_i2c {
-+ void __iomem *base;
-+ struct resource *irqarea;
-+ struct resource *ioarea;
-+ u32 irq;
-+ struct i2c_adapter *adap;
-+ u32 flags;
-+};
-+
-+/*
-+ * registering functions to load algorithms at runtime
-+ */
-+int i2c_mcf_add_bus(struct i2c_adapter *adap)
-+{
-+ struct i2c_algo_mcf_data *mcf_adap = adap->algo_data;
-+
-+ /*adap->id |= mcf_algo.id;*/
-+ adap->algo = &mcf_algo;
-+ adap->timeout = 100;
-+
-+ mcf_i2c_init(mcf_adap);
-+
-+ i2c_add_numbered_adapter(adap);
-+
-+ return 0;
-+}
-+
-+static int mcf_i2c_probe(struct platform_device *pdev)
-+{
-+ struct coldfire_i2c *i2c;
-+ int rc = 0;
-+
-+ /************************************************************/
-+ i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
-+ if (!i2c) {
-+ printk(KERN_ERR "%s kzalloc coldfire_i2c faile\n",
-+ __func__);
-+ return -ENOMEM;
-+ }
-+ /****************************************************************/
-+ platform_set_drvdata(pdev, i2c);
-+
-+ i2c->adap = &i2c_mcf_board_adapter;
-+ i2c->adap->dev.parent = &pdev->dev;
-+ i2c->adap->nr = pdev->id;
-+ rc = i2c_mcf_add_bus(i2c->adap);
-+ if (rc < 0) {
-+ printk(KERN_ERR "%s - failed to add adapter\n", __func__);
-+ rc = -ENODEV;
-+ goto fail_add;
-+ }
-+
-+ printk(KERN_INFO "i2c-algo-mcf.o: I2C ColdFire algorithm"
-+ " module is loaded.\n");
-+ return rc;
-+
-+fail_add:
-+ kfree(i2c);
-+ return rc;
-+};
-+
-+static int mcf_i2c_remove(struct platform_device *pdev)
-+{
-+ struct coldfire_i2c *i2c = platform_get_drvdata(pdev);
-+
-+ i2c_del_adapter(i2c->adap);
-+ platform_set_drvdata(pdev, NULL);
-+ iounmap(i2c->base);
-+ kfree(i2c);
-+ return 0;
-+};
-+
-+/* Structure for a device driver */
-+static struct platform_driver mcf_i2c_driver = {
-+ .probe = mcf_i2c_probe,
-+ .remove = mcf_i2c_remove,
-+ .driver = {
-+ .owner = THIS_MODULE,
-+ .name = "mcf-i2c",
-+ },
-+};
-+
-+#ifdef CONFIG_PROC_FS
-+
-+/*
-+ * Info exported via "/proc/driver/i2c".
-+ */
-+
-+static int gen_i2c_proc_output(char *buf)
-+{
-+ char *p;
-+
-+ p = buf;
-+ p += sprintf(p,
-+ "I2CR: 0x%x\n"
-+ "I2SR: 0x%x\n"
-+ "I2DR: 0x%x\n",
-+ MCF_I2CR, MCF_I2SR, MCF_I2DR);
-+
-+ return p - buf;
-+}
-+
-+static int gen_i2c_read_proc(char *page, char **start, off_t off,
-+ int count, int *eof, void *data)
-+{
-+ int len = gen_i2c_proc_output(page);
-+ if (len <= off+count)
-+ *eof = 1;
-+ *start = page + off;
-+ len -= off;
-+ if (len > count)
-+ len = count;
-+ if (len < 0)
-+ len = 0;
-+ return len;
-+}
-+
-+static int __init gen_i2c_proc_init(void)
-+{
-+ struct proc_dir_entry *r;
-+
-+ r = create_proc_read_entry("driver/i2c-adaptor-register", 0, NULL,
-+ gen_i2c_read_proc, NULL);
-+ if (!r)
-+ return -ENOMEM;
-+ return 0;
-+}
-+#else
-+static inline int gen_i2c_proc_init(void) { return 0; }
-+#endif /* CONFIG_PROC_FS */
-+
-+static int __init coldfire_i2c_init(void)
-+{
-+ int retval;
-+
-+ retval = gen_i2c_proc_init();
-+ if (retval < 0)
-+ printk(KERN_INFO "generate /proc/i2c-adaptor-register "
-+ "for i2c master mode failed!\n");
-+
-+ return platform_driver_register(&mcf_i2c_driver);
-+}
-+
-+static void __exit coldfire_i2c_exit(void)
-+{
-+ platform_driver_unregister(&mcf_i2c_driver);
-+}
-+
-+module_init(coldfire_i2c_init);
-+module_exit(coldfire_i2c_exit);
-+
-+MODULE_AUTHOR("Adrian Cox <adrian@humboldt.co.uk>");
-+MODULE_DESCRIPTION("I2C-Bus adapter for MCFV4/MCFV4E processors");
-+MODULE_LICENSE("GPL");
generated by cgit v1.1 at 2024-12-18 12:18:47 +0000