+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright 2013 Broadcom Corporation.
- *
- * NOTE: This driver should be converted to driver model before June 2017.
- * Please see doc/driver-model/i2c-howto.rst for instructions.
- */
-
-#include <common.h>
-#include <log.h>
-#include <asm/io.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <asm/arch/sysmap.h>
-#include <asm/kona-common/clk.h>
-#include <i2c.h>
-
-/* Hardware register offsets and field defintions */
-#define CS_OFFSET 0x00000020
-#define CS_ACK_SHIFT 3
-#define CS_ACK_MASK 0x00000008
-#define CS_ACK_CMD_GEN_START 0x00000000
-#define CS_ACK_CMD_GEN_RESTART 0x00000001
-#define CS_CMD_SHIFT 1
-#define CS_CMD_CMD_NO_ACTION 0x00000000
-#define CS_CMD_CMD_START_RESTART 0x00000001
-#define CS_CMD_CMD_STOP 0x00000002
-#define CS_EN_SHIFT 0
-#define CS_EN_CMD_ENABLE_BSC 0x00000001
-
-#define TIM_OFFSET 0x00000024
-#define TIM_PRESCALE_SHIFT 6
-#define TIM_P_SHIFT 3
-#define TIM_NO_DIV_SHIFT 2
-#define TIM_DIV_SHIFT 0
-
-#define DAT_OFFSET 0x00000028
-
-#define TOUT_OFFSET 0x0000002c
-
-#define TXFCR_OFFSET 0x0000003c
-#define TXFCR_FIFO_FLUSH_MASK 0x00000080
-#define TXFCR_FIFO_EN_MASK 0x00000040
-
-#define IER_OFFSET 0x00000044
-#define IER_READ_COMPLETE_INT_MASK 0x00000010
-#define IER_I2C_INT_EN_MASK 0x00000008
-#define IER_FIFO_INT_EN_MASK 0x00000002
-#define IER_NOACK_EN_MASK 0x00000001
-
-#define ISR_OFFSET 0x00000048
-#define ISR_RESERVED_MASK 0xffffff60
-#define ISR_CMDBUSY_MASK 0x00000080
-#define ISR_READ_COMPLETE_MASK 0x00000010
-#define ISR_SES_DONE_MASK 0x00000008
-#define ISR_ERR_MASK 0x00000004
-#define ISR_TXFIFOEMPTY_MASK 0x00000002
-#define ISR_NOACK_MASK 0x00000001
-
-#define CLKEN_OFFSET 0x0000004c
-#define CLKEN_AUTOSENSE_OFF_MASK 0x00000080
-#define CLKEN_M_SHIFT 4
-#define CLKEN_N_SHIFT 1
-#define CLKEN_CLKEN_MASK 0x00000001
-
-#define FIFO_STATUS_OFFSET 0x00000054
-#define FIFO_STATUS_RXFIFO_EMPTY_MASK 0x00000004
-#define FIFO_STATUS_TXFIFO_EMPTY_MASK 0x00000010
-
-#define HSTIM_OFFSET 0x00000058
-#define HSTIM_HS_MODE_MASK 0x00008000
-#define HSTIM_HS_HOLD_SHIFT 10
-#define HSTIM_HS_HIGH_PHASE_SHIFT 5
-#define HSTIM_HS_SETUP_SHIFT 0
-
-#define PADCTL_OFFSET 0x0000005c
-#define PADCTL_PAD_OUT_EN_MASK 0x00000004
-
-#define RXFCR_OFFSET 0x00000068
-#define RXFCR_NACK_EN_SHIFT 7
-#define RXFCR_READ_COUNT_SHIFT 0
-#define RXFIFORDOUT_OFFSET 0x0000006c
-
-/* Locally used constants */
-#define MAX_RX_FIFO_SIZE 64U /* bytes */
-#define MAX_TX_FIFO_SIZE 64U /* bytes */
-
-#define I2C_TIMEOUT 100000 /* usecs */
-
-#define WAIT_INT_CHK 100 /* usecs */
-#if I2C_TIMEOUT % WAIT_INT_CHK
-#error I2C_TIMEOUT must be a multiple of WAIT_INT_CHK
-#endif
-
-/* Operations that can be commanded to the controller */
-enum bcm_kona_cmd_t {
- BCM_CMD_NOACTION = 0,
- BCM_CMD_START,
- BCM_CMD_RESTART,
- BCM_CMD_STOP,
-};
-
-/* Internal divider settings for standard mode, fast mode and fast mode plus */
-struct bus_speed_cfg {
- uint8_t time_m; /* Number of cycles for setup time */
- uint8_t time_n; /* Number of cycles for hold time */
- uint8_t prescale; /* Prescale divider */
- uint8_t time_p; /* Timing coefficient */
- uint8_t no_div; /* Disable clock divider */
- uint8_t time_div; /* Post-prescale divider */
-};
-
-static const struct bus_speed_cfg std_cfg_table[] = {
- [IC_SPEED_MODE_STANDARD] = {0x01, 0x01, 0x03, 0x06, 0x00, 0x02},
- [IC_SPEED_MODE_FAST] = {0x05, 0x01, 0x03, 0x05, 0x01, 0x02},
- [IC_SPEED_MODE_FAST_PLUS] = {0x01, 0x01, 0x03, 0x01, 0x01, 0x03},
-};
-
-struct bcm_kona_i2c_dev {
- void *base;
- uint speed;
- const struct bus_speed_cfg *std_cfg;
-};
-
-/* Keep these two defines in sync */
-#define DEF_SPD I2C_SPEED_STANDARD_RATE
-#define DEF_SPD_ENUM IC_SPEED_MODE_STANDARD
-
-#define DEF_DEVICE(num) \
-{(void *)CONFIG_SYS_I2C_BASE##num, DEF_SPD, &std_cfg_table[DEF_SPD_ENUM]}
-
-static struct bcm_kona_i2c_dev g_i2c_devs[CFG_SYS_MAX_I2C_BUS] = {
-#ifdef CONFIG_SYS_I2C_BASE0
- DEF_DEVICE(0),
-#endif
-#ifdef CONFIG_SYS_I2C_BASE1
- DEF_DEVICE(1),
-#endif
-#ifdef CONFIG_SYS_I2C_BASE2
- DEF_DEVICE(2),
-#endif
-#ifdef CONFIG_SYS_I2C_BASE3
- DEF_DEVICE(3),
-#endif
-#ifdef CONFIG_SYS_I2C_BASE4
- DEF_DEVICE(4),
-#endif
-#ifdef CONFIG_SYS_I2C_BASE5
- DEF_DEVICE(5),
-#endif
-};
-
-#define I2C_M_TEN 0x0010 /* ten bit address */
-#define I2C_M_RD 0x0001 /* read data */
-#define I2C_M_NOSTART 0x4000 /* no restart between msgs */
-
-struct kona_i2c_msg {
- uint16_t addr;
- uint16_t flags;
- uint16_t len;
- uint8_t *buf;
-};
-
-static void bcm_kona_i2c_send_cmd_to_ctrl(struct bcm_kona_i2c_dev *dev,
- enum bcm_kona_cmd_t cmd)
-{
- debug("%s, %d\n", __func__, cmd);
-
- switch (cmd) {
- case BCM_CMD_NOACTION:
- writel((CS_CMD_CMD_NO_ACTION << CS_CMD_SHIFT) |
- (CS_EN_CMD_ENABLE_BSC << CS_EN_SHIFT),
- dev->base + CS_OFFSET);
- break;
-
- case BCM_CMD_START:
- writel((CS_ACK_CMD_GEN_START << CS_ACK_SHIFT) |
- (CS_CMD_CMD_START_RESTART << CS_CMD_SHIFT) |
- (CS_EN_CMD_ENABLE_BSC << CS_EN_SHIFT),
- dev->base + CS_OFFSET);
- break;
-
- case BCM_CMD_RESTART:
- writel((CS_ACK_CMD_GEN_RESTART << CS_ACK_SHIFT) |
- (CS_CMD_CMD_START_RESTART << CS_CMD_SHIFT) |
- (CS_EN_CMD_ENABLE_BSC << CS_EN_SHIFT),
- dev->base + CS_OFFSET);
- break;
-
- case BCM_CMD_STOP:
- writel((CS_CMD_CMD_STOP << CS_CMD_SHIFT) |
- (CS_EN_CMD_ENABLE_BSC << CS_EN_SHIFT),
- dev->base + CS_OFFSET);
- break;
-
- default:
- printf("Unknown command %d\n", cmd);
- }
-}
-
-static void bcm_kona_i2c_enable_clock(struct bcm_kona_i2c_dev *dev)
-{
- writel(readl(dev->base + CLKEN_OFFSET) | CLKEN_CLKEN_MASK,
- dev->base + CLKEN_OFFSET);
-}
-
-static void bcm_kona_i2c_disable_clock(struct bcm_kona_i2c_dev *dev)
-{
- writel(readl(dev->base + CLKEN_OFFSET) & ~CLKEN_CLKEN_MASK,
- dev->base + CLKEN_OFFSET);
-}
-
-/* Wait until at least one of the mask bit(s) are set */
-static unsigned long wait_for_int_timeout(struct bcm_kona_i2c_dev *dev,
- unsigned long time_left,
- uint32_t mask)
-{
- uint32_t status;
-
- while (time_left) {
- status = readl(dev->base + ISR_OFFSET);
-
- if ((status & ~ISR_RESERVED_MASK) == 0) {
- debug("Bogus I2C interrupt 0x%x\n", status);
- continue;
- }
-
- /* Must flush the TX FIFO when NAK detected */
- if (status & ISR_NOACK_MASK)
- writel(TXFCR_FIFO_FLUSH_MASK | TXFCR_FIFO_EN_MASK,
- dev->base + TXFCR_OFFSET);
-
- writel(status & ~ISR_RESERVED_MASK, dev->base + ISR_OFFSET);
-
- if (status & mask) {
- /* We are done since one of the mask bits are set */
- return time_left;
- }
- udelay(WAIT_INT_CHK);
- time_left -= WAIT_INT_CHK;
- }
- return 0;
-}
-
-/* Send command to I2C bus */
-static int bcm_kona_send_i2c_cmd(struct bcm_kona_i2c_dev *dev,
- enum bcm_kona_cmd_t cmd)
-{
- int rc = 0;
- unsigned long time_left = I2C_TIMEOUT;
-
- /* Send the command */
- bcm_kona_i2c_send_cmd_to_ctrl(dev, cmd);
-
- /* Wait for transaction to finish or timeout */
- time_left = wait_for_int_timeout(dev, time_left, IER_I2C_INT_EN_MASK);
-
- if (!time_left) {
- printf("controller timed out\n");
- rc = -ETIMEDOUT;
- }
-
- /* Clear command */
- bcm_kona_i2c_send_cmd_to_ctrl(dev, BCM_CMD_NOACTION);
-
- return rc;
-}
-
-/* Read a single RX FIFO worth of data from the i2c bus */
-static int bcm_kona_i2c_read_fifo_single(struct bcm_kona_i2c_dev *dev,
- uint8_t *buf, unsigned int len,
- unsigned int last_byte_nak)
-{
- unsigned long time_left = I2C_TIMEOUT;
-
- /* Start the RX FIFO */
- writel((last_byte_nak << RXFCR_NACK_EN_SHIFT) |
- (len << RXFCR_READ_COUNT_SHIFT), dev->base + RXFCR_OFFSET);
-
- /* Wait for FIFO read to complete */
- time_left =
- wait_for_int_timeout(dev, time_left, IER_READ_COMPLETE_INT_MASK);
-
- if (!time_left) {
- printf("RX FIFO time out\n");
- return -EREMOTEIO;
- }
-
- /* Read data from FIFO */
- for (; len > 0; len--, buf++)
- *buf = readl(dev->base + RXFIFORDOUT_OFFSET);
-
- return 0;
-}
-
-/* Read any amount of data using the RX FIFO from the i2c bus */
-static int bcm_kona_i2c_read_fifo(struct bcm_kona_i2c_dev *dev,
- struct kona_i2c_msg *msg)
-{
- unsigned int bytes_to_read = MAX_RX_FIFO_SIZE;
- unsigned int last_byte_nak = 0;
- unsigned int bytes_read = 0;
- int rc;
-
- uint8_t *tmp_buf = msg->buf;
-
- while (bytes_read < msg->len) {
- if (msg->len - bytes_read <= MAX_RX_FIFO_SIZE) {
- last_byte_nak = 1; /* NAK last byte of transfer */
- bytes_to_read = msg->len - bytes_read;
- }
-
- rc = bcm_kona_i2c_read_fifo_single(dev, tmp_buf, bytes_to_read,
- last_byte_nak);
- if (rc < 0)
- return -EREMOTEIO;
-
- bytes_read += bytes_to_read;
- tmp_buf += bytes_to_read;
- }
-
- return 0;
-}
-
-/* Write a single byte of data to the i2c bus */
-static int bcm_kona_i2c_write_byte(struct bcm_kona_i2c_dev *dev, uint8_t data,
- unsigned int nak_expected)
-{
- unsigned long time_left = I2C_TIMEOUT;
- unsigned int nak_received;
-
- /* Clear pending session done interrupt */
- writel(ISR_SES_DONE_MASK, dev->base + ISR_OFFSET);
-
- /* Send one byte of data */
- writel(data, dev->base + DAT_OFFSET);
-
- time_left = wait_for_int_timeout(dev, time_left, IER_I2C_INT_EN_MASK);
-
- if (!time_left) {
- debug("controller timed out\n");
- return -ETIMEDOUT;
- }
-
- nak_received = readl(dev->base + CS_OFFSET) & CS_ACK_MASK ? 1 : 0;
-
- if (nak_received ^ nak_expected) {
- debug("unexpected NAK/ACK\n");
- return -EREMOTEIO;
- }
-
- return 0;
-}
-
-/* Write a single TX FIFO worth of data to the i2c bus */
-static int bcm_kona_i2c_write_fifo_single(struct bcm_kona_i2c_dev *dev,
- uint8_t *buf, unsigned int len)
-{
- int k;
- unsigned long time_left = I2C_TIMEOUT;
- unsigned int fifo_status;
-
- /* Write data into FIFO */
- for (k = 0; k < len; k++)
- writel(buf[k], (dev->base + DAT_OFFSET));
-
- /* Wait for FIFO to empty */
- do {
- time_left =
- wait_for_int_timeout(dev, time_left,
- (IER_FIFO_INT_EN_MASK |
- IER_NOACK_EN_MASK));
- fifo_status = readl(dev->base + FIFO_STATUS_OFFSET);
- } while (time_left && !(fifo_status & FIFO_STATUS_TXFIFO_EMPTY_MASK));
-
- /* Check if there was a NAK */
- if (readl(dev->base + CS_OFFSET) & CS_ACK_MASK) {
- printf("unexpected NAK\n");
- return -EREMOTEIO;
- }
-
- /* Check if a timeout occurred */
- if (!time_left) {
- printf("completion timed out\n");
- return -EREMOTEIO;
- }
-
- return 0;
-}
-
-/* Write any amount of data using TX FIFO to the i2c bus */
-static int bcm_kona_i2c_write_fifo(struct bcm_kona_i2c_dev *dev,
- struct kona_i2c_msg *msg)
-{
- unsigned int bytes_to_write = MAX_TX_FIFO_SIZE;
- unsigned int bytes_written = 0;
- int rc;
-
- uint8_t *tmp_buf = msg->buf;
-
- while (bytes_written < msg->len) {
- if (msg->len - bytes_written <= MAX_TX_FIFO_SIZE)
- bytes_to_write = msg->len - bytes_written;
-
- rc = bcm_kona_i2c_write_fifo_single(dev, tmp_buf,
- bytes_to_write);
- if (rc < 0)
- return -EREMOTEIO;
-
- bytes_written += bytes_to_write;
- tmp_buf += bytes_to_write;
- }
-
- return 0;
-}
-
-/* Send i2c address */
-static int bcm_kona_i2c_do_addr(struct bcm_kona_i2c_dev *dev,
- struct kona_i2c_msg *msg)
-{
- unsigned char addr;
-
- if (msg->flags & I2C_M_TEN) {
- /* First byte is 11110XX0 where XX is upper 2 bits */
- addr = 0xf0 | ((msg->addr & 0x300) >> 7);
- if (bcm_kona_i2c_write_byte(dev, addr, 0) < 0)
- return -EREMOTEIO;
-
- /* Second byte is the remaining 8 bits */
- addr = msg->addr & 0xff;
- if (bcm_kona_i2c_write_byte(dev, addr, 0) < 0)
- return -EREMOTEIO;
-
- if (msg->flags & I2C_M_RD) {
- /* For read, send restart command */
- if (bcm_kona_send_i2c_cmd(dev, BCM_CMD_RESTART) < 0)
- return -EREMOTEIO;
-
- /* Then re-send the first byte with the read bit set */
- addr = 0xf0 | ((msg->addr & 0x300) >> 7) | 0x01;
- if (bcm_kona_i2c_write_byte(dev, addr, 0) < 0)
- return -EREMOTEIO;
- }
- } else {
- addr = msg->addr << 1;
-
- if (msg->flags & I2C_M_RD)
- addr |= 1;
-
- if (bcm_kona_i2c_write_byte(dev, addr, 0) < 0)
- return -EREMOTEIO;
- }
-
- return 0;
-}
-
-static void bcm_kona_i2c_enable_autosense(struct bcm_kona_i2c_dev *dev)
-{
- writel(readl(dev->base + CLKEN_OFFSET) & ~CLKEN_AUTOSENSE_OFF_MASK,
- dev->base + CLKEN_OFFSET);
-}
-
-static void bcm_kona_i2c_config_timing(struct bcm_kona_i2c_dev *dev)
-{
- writel(readl(dev->base + HSTIM_OFFSET) & ~HSTIM_HS_MODE_MASK,
- dev->base + HSTIM_OFFSET);
-
- writel((dev->std_cfg->prescale << TIM_PRESCALE_SHIFT) |
- (dev->std_cfg->time_p << TIM_P_SHIFT) |
- (dev->std_cfg->no_div << TIM_NO_DIV_SHIFT) |
- (dev->std_cfg->time_div << TIM_DIV_SHIFT),
- dev->base + TIM_OFFSET);
-
- writel((dev->std_cfg->time_m << CLKEN_M_SHIFT) |
- (dev->std_cfg->time_n << CLKEN_N_SHIFT) |
- CLKEN_CLKEN_MASK, dev->base + CLKEN_OFFSET);
-}
-
-/* Master transfer function */
-static int bcm_kona_i2c_xfer(struct bcm_kona_i2c_dev *dev,
- struct kona_i2c_msg msgs[], int num)
-{
- struct kona_i2c_msg *pmsg;
- int rc = 0;
- int i;
-
- /* Enable pad output */
- writel(0, dev->base + PADCTL_OFFSET);
-
- /* Enable internal clocks */
- bcm_kona_i2c_enable_clock(dev);
-
- /* Send start command */
- rc = bcm_kona_send_i2c_cmd(dev, BCM_CMD_START);
- if (rc < 0) {
- printf("Start command failed rc = %d\n", rc);
- goto xfer_disable_pad;
- }
-
- /* Loop through all messages */
- for (i = 0; i < num; i++) {
- pmsg = &msgs[i];
-
- /* Send restart for subsequent messages */
- if ((i != 0) && ((pmsg->flags & I2C_M_NOSTART) == 0)) {
- rc = bcm_kona_send_i2c_cmd(dev, BCM_CMD_RESTART);
- if (rc < 0) {
- printf("restart cmd failed rc = %d\n", rc);
- goto xfer_send_stop;
- }
- }
-
- /* Send slave address */
- if (!(pmsg->flags & I2C_M_NOSTART)) {
- rc = bcm_kona_i2c_do_addr(dev, pmsg);
- if (rc < 0) {
- debug("NAK from addr %2.2x msg#%d rc = %d\n",
- pmsg->addr, i, rc);
- goto xfer_send_stop;
- }
- }
-
- /* Perform data transfer */
- if (pmsg->flags & I2C_M_RD) {
- rc = bcm_kona_i2c_read_fifo(dev, pmsg);
- if (rc < 0) {
- printf("read failure\n");
- goto xfer_send_stop;
- }
- } else {
- rc = bcm_kona_i2c_write_fifo(dev, pmsg);
- if (rc < 0) {
- printf("write failure");
- goto xfer_send_stop;
- }
- }
- }
-
- rc = num;
-
-xfer_send_stop:
- /* Send a STOP command */
- bcm_kona_send_i2c_cmd(dev, BCM_CMD_STOP);
-
-xfer_disable_pad:
- /* Disable pad output */
- writel(PADCTL_PAD_OUT_EN_MASK, dev->base + PADCTL_OFFSET);
-
- /* Stop internal clock */
- bcm_kona_i2c_disable_clock(dev);
-
- return rc;
-}
-
-static uint bcm_kona_i2c_assign_bus_speed(struct bcm_kona_i2c_dev *dev,
- uint speed)
-{
- switch (speed) {
- case I2C_SPEED_STANDARD_RATE:
- dev->std_cfg = &std_cfg_table[IC_SPEED_MODE_STANDARD];
- break;
- case I2C_SPEED_FAST_RATE:
- dev->std_cfg = &std_cfg_table[IC_SPEED_MODE_FAST];
- break;
- case I2C_SPEED_FAST_PLUS_RATE:
- dev->std_cfg = &std_cfg_table[IC_SPEED_MODE_FAST_PLUS];
- break;
- default:
- printf("%d hz bus speed not supported\n", speed);
- return -EINVAL;
- }
- dev->speed = speed;
- return 0;
-}
-
-static void bcm_kona_i2c_init(struct bcm_kona_i2c_dev *dev)
-{
- /* Parse bus speed */
- bcm_kona_i2c_assign_bus_speed(dev, dev->speed);
-
- /* Enable internal clocks */
- bcm_kona_i2c_enable_clock(dev);
-
- /* Configure internal dividers */
- bcm_kona_i2c_config_timing(dev);
-
- /* Disable timeout */
- writel(0, dev->base + TOUT_OFFSET);
-
- /* Enable autosense */
- bcm_kona_i2c_enable_autosense(dev);
-
- /* Enable TX FIFO */
- writel(TXFCR_FIFO_FLUSH_MASK | TXFCR_FIFO_EN_MASK,
- dev->base + TXFCR_OFFSET);
-
- /* Mask all interrupts */
- writel(0, dev->base + IER_OFFSET);
-
- /* Clear all pending interrupts */
- writel(ISR_CMDBUSY_MASK |
- ISR_READ_COMPLETE_MASK |
- ISR_SES_DONE_MASK |
- ISR_ERR_MASK |
- ISR_TXFIFOEMPTY_MASK | ISR_NOACK_MASK, dev->base + ISR_OFFSET);
-
- /* Enable the controller but leave it idle */
- bcm_kona_i2c_send_cmd_to_ctrl(dev, BCM_CMD_NOACTION);
-
- /* Disable pad output */
- writel(PADCTL_PAD_OUT_EN_MASK, dev->base + PADCTL_OFFSET);
-}
-
-/*
- * uboot layer
- */
-struct bcm_kona_i2c_dev *kona_get_dev(struct i2c_adapter *adap)
-{
- return &g_i2c_devs[adap->hwadapnr];
-}
-
-static void kona_i2c_init(struct i2c_adapter *adap, int speed, int slaveaddr)
-{
- struct bcm_kona_i2c_dev *dev = kona_get_dev(adap);
-
- if (clk_bsc_enable(dev->base))
- return;
-
- bcm_kona_i2c_init(dev);
-}
-
-static int kona_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
- int alen, uchar *buffer, int len)
-{
- /* msg[0] writes the addr, msg[1] reads the data */
- struct kona_i2c_msg msg[2];
- unsigned char msgbuf0[64];
- struct bcm_kona_i2c_dev *dev = kona_get_dev(adap);
-
- msg[0].addr = chip;
- msg[0].flags = 0;
- msg[0].len = 1;
- msg[0].buf = msgbuf0; /* msgbuf0 contains incrementing reg addr */
-
- msg[1].addr = chip;
- msg[1].flags = I2C_M_RD;
- /* msg[1].buf dest ptr increments each read */
-
- msgbuf0[0] = (unsigned char)addr;
- msg[1].buf = buffer;
- msg[1].len = len;
- if (bcm_kona_i2c_xfer(dev, msg, 2) < 0) {
- /* Sending 2 i2c messages */
- kona_i2c_init(adap, adap->speed, adap->slaveaddr);
- debug("I2C read: I/O error\n");
- return -EIO;
- }
- return 0;
-}
-
-static int kona_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
- int alen, uchar *buffer, int len)
-{
- struct kona_i2c_msg msg[1];
- unsigned char msgbuf0[64];
- unsigned int i;
- struct bcm_kona_i2c_dev *dev = kona_get_dev(adap);
-
- msg[0].addr = chip;
- msg[0].flags = 0;
- msg[0].len = 2; /* addr byte plus data */
- msg[0].buf = msgbuf0;
-
- for (i = 0; i < len; i++) {
- msgbuf0[0] = addr++;
- msgbuf0[1] = buffer[i];
- if (bcm_kona_i2c_xfer(dev, msg, 1) < 0) {
- kona_i2c_init(adap, adap->speed, adap->slaveaddr);
- debug("I2C write: I/O error\n");
- return -EIO;
- }
- }
- return 0;
-}
-
-static int kona_i2c_probe(struct i2c_adapter *adap, uchar chip)
-{
- uchar tmp;
-
- /*
- * read addr 0x0 of the given chip.
- */
- return kona_i2c_read(adap, chip, 0x0, 1, &tmp, 1);
-}
-
-static uint kona_i2c_set_bus_speed(struct i2c_adapter *adap, uint speed)
-{
- struct bcm_kona_i2c_dev *dev = kona_get_dev(adap);
- return bcm_kona_i2c_assign_bus_speed(dev, speed);
-}
-
-/*
- * Register kona i2c adapters. Keep the order below so
- * that the bus number matches the adapter number.
- */
-#define DEF_ADAPTER(num) \
-U_BOOT_I2C_ADAP_COMPLETE(kona##num, kona_i2c_init, kona_i2c_probe, \
- kona_i2c_read, kona_i2c_write, \
- kona_i2c_set_bus_speed, DEF_SPD, 0x00, num)
-
-#ifdef CONFIG_SYS_I2C_BASE0
- DEF_ADAPTER(0)
-#endif
-#ifdef CONFIG_SYS_I2C_BASE1
- DEF_ADAPTER(1)
-#endif
-#ifdef CONFIG_SYS_I2C_BASE2
- DEF_ADAPTER(2)
-#endif
-#ifdef CONFIG_SYS_I2C_BASE3
- DEF_ADAPTER(3)
-#endif
-#ifdef CONFIG_SYS_I2C_BASE4
- DEF_ADAPTER(4)
-#endif
-#ifdef CONFIG_SYS_I2C_BASE5
- DEF_ADAPTER(5)
-#endif
projects / platform / kernel / u-boot.git / commitdiff